C1111233131211111211113313331333133313331312331333133322121113121   >>    C111123313121111121111331333133313331333131233133313332212111312   <<    C1111233131211111211113313331333133313331312331333133322121113123   >>      C1111233131211111211113313331333133313331312331333133322121113122   >>