C11111211113313112113313331333133313331333133213331333112323221   >>    C1111121111331311211331333133313331333133313321333133311232322   <<    C11111211113313112113313331333133313331333133213331333112323223   >>      C11111211113313112113313331333133313331333133213331333112323222   >>