C1111233131211111211113313331333133313331333133313331333133313112112113322121   >>    C111123313121111121111331333133313331333133313331333133313331311211211332212   <<    C1111233131211111211113313331333133313331333133313331333133313112112113322123   >>      C1111233131211111211113313331333133313331333133313331333133313112112113322122   >>