#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char *argv[]){

    int n=0,m=0,max=0,elvalaszto=0,vanpiros=0,pirosDb=0;
    char nev[100],zaszlo[55];
    char c;

    FILE *f;

    f = fopen(argv[1],"r");
    c = 'a';

    while(c  != EOF){
        c = fgetc(f);
        if(c == ':'){
            elvalaszto++;
        }
        if(elvalaszto > 0 && c != ':'){
            zaszlo[m] = c;
            ++m;
            zaszlo[m] = '\0';
        }
        if(elvalaszto > 1 && c == ':' || c == '\n'){
            if((strcmp(zaszlo,"piros")) == 0){
                vanpiros = 1;

            }
        }
        if(c == '\n' || c == EOF){
            if(vanpiros == 1){
                pirosDb++;
                if(elvalaszto > max){
                    max = elvalaszto;
                }
            }

            m = 0;
            elvalaszto = 0;
            vanpiros = 0;
        }
    }

    printf("%d\n",pirosDb);

    rewind(f);
    c = 'a';

    while (c != EOF){
        c = fgetc(f);

        if(c == ':'){
            elvalaszto++;
        }
        if(elvalaszto == 0 && c != ':'){
            nev[n] = c;
            ++n;
            nev[n] = '\0';
        }
        if(elvalaszto > 0 && c != ':'){
            zaszlo[m] = c;
            ++m;
            zaszlo[m] = '\0';
        }
        if(elvalaszto > 1 && c == ':' || c == '\n'){
            if((strcmp(zaszlo,"piros")) == 0){
                vanpiros = 1;
            }
        }
        if(c == '\n' || c == EOF){

            if(vanpiros == 1)
                if(elvalaszto >= max){
                    printf("%s\n",nev);
                }
            n = 0;
            m = 0;
            elvalaszto = 0;
            vanpiros = 0;
        }

    }
fclose(f);
return EXIT_SUCCESS;
}