C11111211113313112113313331333133313331333132212111133133112323211   >>    C1111121111331311211331333133313331333133313221211113313311232321   <<    C11111211113313112113313331333133313331333132212111133133112323213   >>      C11111211113313112113313331333133313331333132212111133133112323212   >>