C11111211113313112113313331333133313133313232233133313232233132313223211323311   >>    C1111121111331311211331333133313331313331323223313331323223313231322321132331   <<    C11111211113313112113313331333133313133313232233133313232233132313223211323313   >>      C11111211113313112113313331333133313133313232233133313232233132313223211323312   >>