C11111211113313112113313331333132313331322132333133313231333132313331211   >>    C1111121111331311211331333133313231333132213233313331323133313231333121   <<    C11111211113313112113313331333132313331322132333133313231333132313331213   >>      C11111211113313112113313331333132313331322132333133313231333132313331212   >>