C11111211113313112113313331333133313331312111133132212111112313232321   >>    C1111121111331311211331333133313331333131211113313221211111231323232   <<    C11111211113313112113313331333133313331312111133132212111112313232323   >>      C11111211113313112113313331333133313331312111133132212111112313232322   >>