bool is_pangram(const char* str) {


int ascii_space[123] = { 0 };


for (int i = 0; str[i] != ''; i++) {

ascii_space[(int)str[i]] = 1;

}

for (int i = 65; i < 91; i++) {

ascii_space[0] += ascii_space[i];

}

for (int i = 97; i < 123; i++) {

ascii_space[0] += ascii_space[i];

}


bool result = (ascii_space[0] == 52);

return result;

}