C11111211113313112113313331333133313331333132313331333133313221211113322331221   >>    C1111121111331311211331333133313331333133313231333133313331322121111332233122   <<    C11111211113313112113313331333133313331333132313331333133313221211113322331223   >>      C11111211113313112113313331333133313331333132313331333133313221211113322331222   >>