C11111211113313112113313331333132313331322121111133313331313212121   >>    C1111121111331311211331333133313231333132212111113331333131321212   <<    C11111211113313112113313331333132313331322121111133313331313212123   >>      C11111211113313112113313331333132313331322121111133313331313212122   >>