C11111211113313112113313331333133313331333132212111133133313331333131113231121   >>    C1111121111331311211331333133313331333133313221211113313331333133313111323112   <<    C11111211113313112113313331333133313331333132212111133133313331333131113231123   >>      C11111211113313112113313331333133313331333132212111133133313331333131113231122   >>