10924.cpp

#include <cmath>
#include <cstdio>
#include <cstring>

using namespace std;

bool check(int sum)
{
    int i, bound;

    if (sum > 2 && sum % 2 == 0) return false;

    bound = (int)(sqrt((double)sum) + 0.5);
    for (i = 3; i <= bound; i += 2)
        if (sum % i == 0) return false;

    return true;
}

int main(void)
{
    char word[21];
    int  i, sum;

    while (scanf("%s", word) != EOF) {
        sum = 0;
        for (i = 0; i < strlen(word); ++i)
            if ('a' <= word[i] && word[i] <= 'z')
                sum += word[i] - 'a' + 1;
            else if ('A' <= word[i] && word[i] <= 'Z')
                sum += word[i] - 'A' + 27;

        if (check(sum))
            printf("It is a prime word.\n");
        else
            printf("It is not a prime word.\n");
    }

    return 0;
}