#include <stdio.h>
#include <ctype.h>
int main (int argc, char **argv) {
int i;
char *testcases[] = {
"31", "47", "69", "7A",
"100", "156", "189", "potaTO",
"5G", "19", NULL
};
for (i = 0 ; testcases[i]; i++) {
f(testcases[i]);
}
return 0;
}
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