#include <inttypes.h>
#include <string.h>
#include <stdlib.h>

int main()
{
    char file_name[PATH_MAX];
    uint64_t result = 0;
    struct stat t;
    char* nl;
    while( fgets(file_name, sizeof(file_name)), stdin ) {
        nl = memchr(file_name, '\n', sizeof(file_name));
        if (nl) {
            *nl = '\0';
        }
        if (-1 != lstat(file_name, &st)) {
            if (S_ISREG(st.st_mode)) {
                result += st.st_size;
            }
        }
    }
    printf("%"PRIu64"\n", result);
}