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#include <stdio.h>
#include <string.h>
#define N 10000
char *nums[10] = { "zero (unused)", "one", "two", "three", "four", "five",
"six", "seven", "eight", "nine" };
int main() {
char *buf, line[N];
int j, first, last, sum;
sum = 0;
while ((buf = fgets(line, N, stdin)) != NULL) {
for (first = -1; *buf; buf++) {
for (j = 1; j < 10; j++)
if (!strncmp(buf, nums[j], strlen(nums[j])))
*buf = j + '0';
if (*buf < '0' || *buf > '9') continue;
first = first == -1 ? *buf - '0' : first;
last = *buf - '0';
}
sum += 10 * first + last;
}
printf("%d\n", sum);
return 0;
}
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