C11111211113313112113313331333133313133313232233133313111312321   >>    C1111121111331311211331333133313331313331323223313331311131232   <<    C11111211113313112113313331333133313133313232233133313111312323   >>      C11111211113313112113313331333133313133313232233133313111312322   >>