C11111211113313112113313331333132313331322113121111133313223321   >>    C1111121111331311211331333133313231333132211312111113331322332   <<    C11111211113313112113313331333132313331322113121111133313223323   >>      C11111211113313112113313331333132313331322113121111133313223322   >>