A 10 + B 1 = 11 + C 5 = 16 + D 1 = 17 with 1 and 2 on the wrong side

A 5 + B 1 = 6 + C 2 = 8 + D 1 = 9 with 10 and 1 on the wrong side and not enough time to cross

A 2 + B 1 = 3 + C 10 = 13 + D...