C11111211113313112113313331333133313133313232233133313113313331333132322123121   >>    C1111121111331311211331333133313331313331323223313331311331333133313232212312   <<    C11111211113313112113313331333133313133313232233133313113313331333132322123123   >>      C11111211113313112113313331333133313133313232233133313113313331333132322123122   >>