error when number of rows bigger than 6

[kindlychung]

Here is how it goes in the repl:

    Get ready to play peg thing!
    How many rows? [5]
    7
    Here's your board:
             a0
            b0 c0
          d0 e0 f0
         g0 h0 i0 j0
       k0 l0 m0 n0 o0
      p0 q0 r0 s0 t0 u0

    IndexOutOfBoundsException   clojure.lang.RT.nthFrom (RT.java:795)

[asdofindia]

This is because we run out of alphabets

[gmlewis]

Check out my slightly-tweaked fork to support up to 31 rows:
https://github.com/gmlewis/pegthing