#include<stdio.h>
#include<string.h>
int main()
{
char x[6] = "ab";
char x1[6] = {0};
char y[4] = {0};
int i;
for(i = 1; i<10; i++)
{
sprintf(y,"%d",i);
strcpy(x1,x);
strcat(x1,y);
printf("%s\n",x1);
}
return 0;
}
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