#include <stdio.h>
#include <string.h>
 
void inverter(char *str){
    for (i = 0; i < tam / 2; ++i){
        char temp = *(str + i);
        *(str + i) = *(str + tam - i - 1);
        *(str + tam - i - 1) = temp;
    }
}
 
int main(){
    char strings[4][100];
 
    int i;
    for (i = 0; i < 3; ++i){
        inverter(strings[i]);
    }
 
    return 0;
}
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