C212212121212113313221323131323131323132322331323132233132333132313331313212121   >>    C21221212121211331322132313132313132313232233132313223313233313231333131321212   <<    C212212121212113313221323131323131323132322331323132233132333132313331313212123   >>      C212212121212113313221323131323131323132322331323132233132333132313331313212122   >>