Unnamed

=======================================================
     a b c
   0 1 2 3
 a 1 0 1 2
 b 2 1 0 1
0
=======================================================
     a b c
   0 1 2 3
 a 1 0 1 2
 b 2 1 0 1
 x 3 2 1 1
 c 0 0 0 0
0
=======================================================
     s h o e s
   0 1 2 3 4 5
 s 1 0 1 2 3 3
 o 2 1 1 2 3 4
 c 3 2 1 2 3 4
 k 4 3 2 2 3 4