#include <stdio.h>

void swap(int *a,int *b) {
    int k = *a;
    *a = *b;
    *b = k;
    
} 

int main() {
    int aK = 2;
    int ek = 3;
    swap(&aK,&ek);
    printf("%d %d!\n",aK,ek);
    swap(&aK,&ek);
    printf("%d %d!\n",aK,ek);
    return 0;
}

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