a := 20b := 3b := div(a,b) + bc := mod(a,b) + a
a := 22b := 4c := mod(a,b) + b
a := 26b := 6c := div(a,b) + a
a := 28b := 7b := div(a,b)c := div(a,b)
a := 24b := 5b := mod(a,b) + 4c := mod(a,b) + 1
a := 20b := 3b := div(a,b)c := mod(a, b+1)
a := 24b := 5b := mod(a,b)c := div(a, b+1)