C1111233133313231133133313331333133313231121333133313113313222121   >>    C111123313331323113313331333133313331323112133313331311331322212   <<    C1111233133313231133133313331333133313231121333133313113313222123   >>      C1111233133313231133133313331333133313231121333133313113313222122   >>