abc file by Bernard Loffet
-7 +5 +7 | -7 +5 +7 | -7 +5 +5 | -7 +7 -7 | -6 -4 -7 | -6 -4 -7 | -6 -4 -4 | -6 -7 -6 | +6 +4 -6 | +6 +4 -6 | +6 +4 +4 | +6 -6 +6 | ob5 -4 -4 | -4 +6 -6 | ob5 -3 -3 | ob5 +6 -6 | -7 +5 +5 | +7 -7 +7 | +8 +5 +5 | -7 +8 -7 | -6 -4 -4 | -7 -6 -7 | +9' -4 -4 | -6 +9' -6 | +6 +4 +4 | -6 +6 -6 | +8 +4 +4 | +8 +9' +9 | +9' -4 -4 | +9' +9 -10 | +9' -3 -3 | ob5 +6 -6