C213211331333131212111133133313231333132313331322331323133313232323231   >>    C21321133133313121211113313331323133313231333132233132313331323232323   <<    C213211331333131212111133133313231333132313331322331323133313232323233   >>      C213211331333131212111133133313231333132313331322331323133313232323232   >>