C1111233131211111211113313331312111133132313233313223313232112323231   >>    C111123313121111121111331333131211113313231323331322331323211232323   <<    C1111233131211111211113313331312111133132313233313223313232112323233   >>      C1111233131211111211113313331312111133132313233313223313232112323232   >>