C11111211113313112113313331333133313331333132313331333133112111133131221221   >>    C1111121111331311211331333133313331333133313231333133313311211113313122122   <<    C11111211113313112113313331333133313331333132313331333133112111133131221223   >>      C11111211113313112113313331333133313331333132313331333133112111133131221222   >>