C11111211113313112113313331333131211113313331333132213331121221   >>    C1111121111331311211331333133313121111331333133313221333112122   <<    C11111211113313112113313331333131211113313331333132213331121223   >>      C11111211113313112113313331333131211113313331333132213331121222   >>