C111123313331323113313331333133313231323133312111133132313122321   >>    C11112331333132311331333133313331323132313331211113313231312232   <<    C111123313331323113313331333133313231323133312111133132313122323   >>      C111123313331323113313331333133313231323133312111133132313122322   >>