C3131313233313113313223313223313112113313233313133313132313232211   >>    C313131323331311331322331322331311211331323331313331313231323221   <<    C3131313233313113313223313223313112113313233313133313132313232213   >>      C3131313233313113313223313223313112113313233313133313132313232212   >>