C11111211113313112113313331333133312111113331333133313332233133321121   >>    C1111121111331311211331333133313331211111333133313331333223313332112   <<    C11111211113313112113313331333133312111113331333133313332233133321123   >>      C11111211113313112113313331333133312111113331333133313332233133321122   >>