C11111211113313112113313331333133313331333132212111133132313212121   >>    C1111121111331311211331333133313331333133313221211113313231321212   <<    C11111211113313112113313331333133313331333132212111133132313212123   >>      C11111211113313112113313331333133313331333132212111133132313212122   >>