C1111233131211111211113313331323133313231333133312111111331322331221   >>    C111123313121111121111331333132313331323133313331211111133132233122   <<    C1111233131211111211113313331323133313231333133312111111331322331223   >>      C1111233131211111211113313331323133313231333133312111111331322331222   >>