C11111211113313112113313331333133313331333131211113313331333132321131121   >>    C1111121111331311211331333133313331333133313121111331333133313232113112   <<    C11111211113313112113313331333133313331333131211113313331333132321131123   >>      C11111211113313112113313331333133313331333131211113313331333132321131122   >>