1 2 3 4 5 6 7 8 9 10 11
m←'10:12 11:45 10:15 11:50 10:22 12:05 10:25 12:00' T m r←m m←⍎(,0 5↓m)~':' l:m←(n←(2≤/m),1)/m r←n⌿r →(~×/n)/l r