C11111211113313112113313331333133313331333131211113313331323132313232131121   >>    C1111121111331311211331333133313331333133313121111331333132313231323213112   <<    C11111211113313112113313331333133313331333131211113313331323132313232131123   >>      C11111211113313112113313331333133313331333131211113313331323132313232131122   >>