C11111211113313112113313331333133313231323223313113313231332321   >>    C1111121111331311211331333133313331323132322331311331323133232   <<    C11111211113313112113313331333133313231323223313113313231332323   >>      C11111211113313112113313331333133313231323223313113313231332322   >>