C11112331312111112111133133313331333132322121111331323312113313221321   >>    C1111233131211111211113313331333133313232212111133132331211331322132   <<    C11112331312111112111133133313331333132322121111331323312113313221323   >>      C11112331312111112111133133313331333132322121111331323312113313221322   >>