C11111211113313112113313331333133313231121131211113313232233132311321   >>    C1111121111331311211331333133313331323112113121111331323223313231132   <<    C11111211113313112113313331333133313231121131211113313232233132311323   >>      C11111211113313112113313331333133313231121131211113313232233132311322   >>