C11111211113313112113313331333133313231121131211113313232233112312231   >>    C1111121111331311211331333133313331323112113121111331323223311231223   <<    C11111211113313112113313331333133313231121131211113313232233112312233   >>      C11111211113313112113313331333133313231121131211113313232233112312232   >>