C11111211113313112113313331333133313331312111133133313332321333112121   >>    C1111121111331311211331333133313331333131211113313331333232133311212   <<    C11111211113313112113313331333133313331312111133133313332321333112123   >>      C11111211113313112113313331333133313331312111133133313332321333112122   >>