@D=sort{$a-$b}glob<>;
print
$D[0]==$D[1]||$D[5]==$D[6]
||$D[1]==$D[2]&&$D[2]==$D[3]
||$D[2]==$D[3]&&$D[3]==$D[4]
||$D[3]==$D[4]&&$D[4]==$D[5]
||$D[1]==$D[2]&&$D[4]==$D[5]
?NO:YES