C11112331333132311331333131333133313231333132212111133132331231   >>    C1111233133313231133133313133313331323133313221211113313233123   <<    C11112331333132311331333131333133313231333132212111133132331233   >>      C11112331333132311331333131333133313231333132212111133132331232   >>