C11111211113313112113313331333133313331333131211113313331123313232121   >>    C1111121111331311211331333133313331333133313121111331333112331323212   <<    C11111211113313112113313331333133313331333131211113313331123313232123   >>      C11111211113313112113313331333133313331333131211113313331123313232122   >>