C11111211113313112113313331333133313331312111133132212111133132313221231   >>    C1111121111331311211331333133313331333131211113313221211113313231322123   <<    C11111211113313112113313331333133313331312111133132212111133132313221233   >>      C11111211113313112113313331333133313331312111133132212111133132313221232   >>