C231311112223313112113313231111331322331323133313233313231333133313331323231211   >>    C23131111222331311211331323111133132233132313331323331323133313331333132323121   <<    C231311112223313112113313231111331322331323133313233313231333133313331323231213   >>      C231311112223313112113313231111331322331323133313233313231333133313331323231212   >>