#!/sw/bin/gawk -f

BEGIN{
    FS=":";
    fc=0;
    printf "value-pair";
}

FNR==1{
    fl[fc++]=FILENAME;
    printf ":"FILENAME;
}

{
    fl[FILENAME]++;
    histc[$1,FILENAME]=$2;
    hists[$1]+=$2;
}

END{
    printf "\n"
    for(i in hists){
	printf i;
	for(j=0; j<fc; j++){
	    if (!((i,fl[j]) in histc)) 
		printf ": 0";
	    else 
		printf ":"histc[i,fl[j]];
	}
	printf ": "hists[i]"\n";
    }
}