C1111233131211111211113313331333133313331312331333133313121111331323232211   >>    C111123313121111121111331333133313331333131233133313331312111133132323221   <<    C1111233131211111211113313331333133313331312331333133313121111331323232213   >>      C1111233131211111211113313331333133313331312331333133313121111331323232212   >>