v  X OO    // Project Euler - Problem 76
v
v
   + ... +
   . . . .
   .  .  .
   . . . .
   + ... +

        v+1           p:+3\+1g06:$<            > :50g\-3v
>"d"30p1>:30g`#v_:50p060p1>:50g-!#^_::::50g\-`#^_:     3v
               >1+:1+g.@  ^+1p+3g05+3\p06:+g06g+3-\g05\+<