[craphael@localhost 36puzzle]$ cc -o puzzle puzzle36.c
[craphael@localhost 36puzzle]$ ./puzzle 34
red     yel     grn     blu     ong     prp
yel     grn     ong     prp     red     blu
grn     red     blu     yel     prp     ong
ong     blu     prp     red     yel     grn
blu     prp     red     ong     grn     yel
prp     ong     yel     grn
[craphael@localhost 36puzzle]$ ./puzzle 36
couldn't find any solution