C11111211113313112113313331333133313133313231322331333132322123211111   >>    C1111121111331311211331333133313331313331323132233133313232212321111   <<    C11111211113313112113313331333133313133313231322331333132322123211113   >>      C11111211113313112113313331333133313133313231322331333132322123211112   >>