Example progressions:
1,4,5,1
1,5,-6,4,5
72,75,71,76
71,>1,72,75,<1,71,>3,72,75,71
76,72,75,71,!,76,72,75,71,>2,!,76,72,75,71,!,76,72,75,71
71,74,-94,73,9(5/2),72,-75,91,!,71,74,-94,73,9(5/2),72,-75,-95,!,