sub PRINT {
    printf("\n\t\t%-10s %-10s %-10s\n",'UAS','LCV','DM');
    while(@UAS || @LCV || @DM) {
	printf("\t\t%-10s %-10s %-10s\n",
	    shift(@UAS) || '',
	    shift(@LCV) || '',
	    shift(@DM) || '',
	);
    }
}