If solution is possible , then print it .
if fillUtil ( res , n , n ) : NEW_LINE INDENT for i in range ( 2 * n ) : NEW_LINE INDENT print ( res [ i ] , end = ' ▁ ' ) NEW_LINE DEDENT print ( ) NEW_LINE DEDENT else : NEW_LINE INDENT print ( " Not ▁ Possible " ) NEW_LINE DEDENT