#include <stdio.h>
main()
{
    int shu,ge=0,shi=0,bai=0,qian=0;
    scanf("%d",&shu);
    if(shu<=0 || shu>=10000) printf("输入错误");
    else
    {
    if(shu>=1 && shu<=9) ge=shu;
    if(shu>=10 && shu<=99) ge=shu%10,shi=shu/10;
    if(shu>=100&& shu<=999) ge=shu%10,bai=shu/100,shi=(shu-bai*100)/10;
    if(shu>=1000 && shu<=9999) ge=shu%10,qian=shu/1000,bai=(shu-qian*1000)/100,shi=(shu-qian*1000-bai*100)/10;
    printf("%d,%d,%d,%d",qian,bai,shi,ge);
}
 getchar();
 }