C1111233131211111211113313231333133313331323221333132313331311233133322321   >>    C111123313121111121111331323133313331333132322133313231333131123313332232   <<    C1111233131211111211113313231333133313331323221333132313331311233133322323   >>      C1111233131211111211113313231333133313331323221333132313331311233133322322   >>