C1111233131211111211113313331333133313331333133313331322331333132313112221   >>    C111123313121111121111331333133313331333133313331333132233133313231311222   <<    C1111233131211111211113313331333133313331333133313331322331333132313112223   >>      C1111233131211111211113313331333133313331333133313331322331333132313112222   >>