C213211331333131212111133133313231333132313331322331323231312321   >>    C21321133133313121211113313331323133313231333132233132323131232   <<    C213211331333131212111133133313231333132313331322331323231312323   >>      C213211331333131212111133133313231333132313331322331323231312322   >>