#include<stdio.h> int main() { int a,b,c,d,t; scanf("%d,%d,%d,%d",&a,&b,&c,&d); if (a<b) {t=b;b=a;a=t;} if (a<c) {t=c;c=a;a=t;} if (a<d) {t=d;d=a;a=t;} if (b<c) {t=c;c=b;b=t;} if (b<d) {t=d;d=b;b=t;} if (c<d) {t=d;d=c;c=t;} printf("%d,%d,%d,%d\n",a,b,c,d); return 0; }