\new StaffGroup  \with {\remove "System_start_delimiter_engraver"}
<<
\new Staff = "IV" \with { 
instrumentName = "IV" 
shortInstrumentName = "IV" 
midiInstrument = #"clarinet" 

}
<<

{  
\set Score.markFormatter = #format-mark-box-numbers  \tempo 2 = 60
 \numericTimeSignature \time 2/2
 \clef bass
  
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 { r2  r8[ gis8^\markup { \pad-markup #0.2 "+14"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "4/5" }}] ~ gis4 ~ }
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 { gis2 ~ gis16[ g8.^\markup { \pad-markup #0.2 "+2"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "3/4" }}] ~ g4 ~ }
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 { g8.[ r16] r2.  }
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 { r8.[ g16^\markup { \pad-markup #0.2 "+2"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "IV"\normal-size-super "1/1" }}] ~ g2. ~ }
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 { g2. ~ g8.[ f16^\markup { \pad-markup #0.2 "+10"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "8/11" }}] ~ }
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 { f4 ~ f8[ fis8^\markup { \pad-markup #0.2 "-37"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "3/4" }}] ~ fis2 ~ }
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 { r2.  r8[ gis8^\markup { \pad-markup #0.2 "-5"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "I"\normal-size-super "1/2" }}] ~ }
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 { gis1 ~ }
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 \bar "|" \break \noPageBreak 
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 { gis4 ~ gis8.[ a16^\markup { \pad-markup #0.2 "+33"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "II"\normal-size-super "13/32" }}] ~ a2 ~ }
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 { a4 ~ a16[ g8.^\markup { \pad-markup #0.2 "+41"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "II"\normal-size-super "4/11" }}] ~ g2 ~ }
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 \bar "|" \break \noPageBreak 
<<
 { g8.[ fis16^\markup { \pad-markup #0.2 "-9"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "I"\normal-size-super "1/2" }}] ~ fis2. ~ }
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 \bar "|"  
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 { fis2 ~ fis8[ r8] r4 }
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 { r1  }
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 { r8.[ gis16^\markup { \pad-markup #0.2 "-5"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "I"\normal-size-super "1/2" }}] ~ gis2. ~ }
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 { gis4 g2.^\markup { \pad-markup #0.2 "+41"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "II"\normal-size-super "4/11" }} ~ }
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 \bar "|" \break \noPageBreak 
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 { g2. ~ g8[ a8^\markup { \pad-markup #0.2 "+6"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "II"\normal-size-super "2/5" }}] ~ }
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 { a2 ~ a8.[ ais16^\markup { \pad-markup #0.2 "-28"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "16/11" }}] ~ ais4 ~ }
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 { r8.[ gis16^\markup { \pad-markup #0.2 "+7"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "5/4" }}] ~ gis2. ~ }
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 { gis16[ g8.^\markup { \pad-markup #0.2 "-48"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "8/7" }}] ~ g2. ~ }
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 { g2. ~ g8[ a8^\markup { \pad-markup #0.2 "+19"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "4/3" }}] ~ }
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 { r8[ g8^\markup { \pad-markup #0.2 "-48"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "8/7" }}] ~ g2. ~ }
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 { g2 ~ g8.[ ais16^\markup { \pad-markup #0.2 "-28"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "11/8" }}] ~ ais4 ~ }
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 { r2.  r8[ g8^\markup { \pad-markup #0.2 "+41"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "I"\normal-size-super "7/16" }}] ~ }
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 { g2 ~ g16[ fis8.^\markup { \pad-markup #0.2 "+30"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "III"\normal-size-super "4/3" }}] ~ fis4 ~ }
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<<
 { r4 f2.^\markup { \pad-markup #0.2 "+18"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "IV"\normal-size-super "1/1" }} ~ }
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 { r2  fis2^\markup { \pad-markup #0.2 "+30"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "I"\normal-size-super "2/5" }} ~ }
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 { f4 f2.^\markup { \pad-markup #0.2 "+18"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "I"\normal-size-super "3/8" }} ~ }
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 { f8.[ dis16^\markup { \pad-markup #0.2 "+14"}_\markup {  \lower #3 \pad-markup #0.2 \concat{ "I"\normal-size-super "1/3" }}] ~ dis2. ~ }
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 { r1  }
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<<
 { r1  \fermata  }>> \bar "|." 
} 

>>
>>