1 2 3
o%y=o.o.o$y;o&y=(o%)%y;o#y=o$o$(o%)&y a=r%y;e=r$w&l;l=r#'O';o=r e;r=succ;u=(w&)&a;w=pred;y=r%l main=putStrLn$[w#o,o,l,l,y,w u,w$r&'O',y,a,l,e,u]
1 2
Error occurred ERROR line 1 - Syntax error in declaration (unexpected selector "#y")