C1111133313331323223313331333133313311211111211331323133313221321   >>    C111113331333132322331333133313331331121111121133132313331322132   <<    C1111133313331323223313331333133313311211111211331323133313221323   >>      C1111133313331323223313331333133313311211111211331323133313221322   >>