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int main() {
    //Special test case
    str_t orig = create("horse"); 
    str_t targ = create("horse");
    str_t rpl = create("horse");
    printf("%s\n", orig->strt_content);
    edit(targ, rpl, orig);
    printf("%s\n", orig->strt_content);  // prints "the quick brown cat jumps over the lazy dog"
    
    
    
    //Test case 1 
    str_t orig1 = create("aaaaa"); 
    str_t targ1 = create("aa");
    str_t rpl1= create("bbb");
    printf("Test1 Before:%s\n", orig1->strt_content);
    edit(targ1, rpl1, orig1);
    printf("Test 1 After:%s\n", orig1->strt_content);  // prints "the quick brown cat jumps over the lazy dog"
    
    //Test case 2
    str_t orig2 = create("hypermobility"); 
    str_t targ2 = create("hyper");
    str_t rpl2= create("");
    printf("Test2 Before:%s\n", orig2->strt_content);
    edit(targ2, rpl2, orig2);
    printf("Test2 After:%s\n", orig2->strt_content);  // prints "the quick brown cat jumps over the lazy dog"
    printf("Length:%d\n", orig2->strt_length);
    
    return 0;
}