ruby -pe '$_=($_ =~ /(\w)(?!\1)(\w)(?!\1|\2)(\w)(?!\1|\2|\3)(\w)(?!\1|\2|\3|\4)(\w)(?!\1|\2|\3|\4|\5)(\w)(?!\1|\2|\3|\4|\5|\6)(\w)(?!\1|\2|\3|\4|\5|\6|\7)(\w)(?!\1|\2|\3|\4|\5|\6|\7|\8)(\w)/ ? "YES" : "NO")'