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- #include<stdio.h>
- int main()
- {
- int a,b,temp;
- while(1){
- scanf("%d %d",&a,&b);
- if(a==0 && b==0){break;}
- if(b>a){
- temp=a;
- a=b;
- b=temp;
- }
- printf("%d %d\n",a,b);
- }
- return 0;
- }
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