C1111233131211111211113313331323133313231333133312111113331322331121311   >>    C111123313121111121111331333132313331323133313331211111333132233112131   <<    C1111233131211111211113313331323133313231333133312111113331322331121313   >>      C1111233131211111211113313331323133313231333133312111113331322331121312   >>