C11111211113313112113313331333132313331322121111133313331333133313231231221   >>    C1111121111331311211331333133313231333132212111113331333133313331323123122   <<    C11111211113313112113313331333132313331322121111133313331333133313231231223   >>      C11111211113313112113313331333132313331322121111133313331333133313231231222   >>