C11111211113313112113313331333133313133313232233133313223313131121   >>    C1111121111331311211331333133313331313331323223313331322331313112   <<    C11111211113313112113313331333133313133313232233133313223313131123   >>      C11111211113313112113313331333133313133313232233133313223313131122   >>