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

unsigned count = 1000;
int fnumber;
char    fname[100];
char    *ifil;
char    *ofil;
FILE    *is;
FILE    *os;

main(argc, argv)
char *argv[];
{
    register i, c, f;
    int iflg = 0;

    for(i=1; i<argc; i++)
        if(argv[i][0] == '-')
            switch(argv[i][1]) {

            case '\0':
                iflg = 1;
                continue;

            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
                count = atoi(argv[i]+1);
                continue;
            }
        else if(iflg)
            ofil = argv[i];
        else {
            ifil = argv[i];
            iflg = 2;
        }
    if(iflg != 2)
        is = stdin;
    else
        if((is=fopen(ifil,"r")) == NULL) {
            perror(ifil);
            exit(1);
        }
    if(ofil == 0)
        ofil = "x";

loop:
    f = 1;
    for(i=0; i<count; i++)
    do {
        c = getc(is);
        if(c == EOF) {
            if(f == 0)
                fclose(os);
            exit(0);
        }
        if(f) {
            for(f=0; ofil[f]; f++)
                fname[f] = ofil[f];
            fname[f++] = fnumber/26 + 'a';
            fname[f++] = fnumber%26 + 'a';
            fname[f] = '\0';
            fnumber++;
            if((os=fopen(fname,"w")) == NULL) {
                fprintf(stderr,"Cannot create output\n");
                exit(1);
            }
            f = 0;
        }
        putc(c, os);
    } while(c != '\n');
    fclose(os);
    goto loop;
}
