#include <stdio.h>
#include <string.h>

void shifrator(char * s) {
    for (int i = 0; i < strlen(s); ++i) {
        s[i] = s[i] / 7;
    }
}

void deshifrator(char * s) {
    for (int i = 0; i < strlen(s); ++i) {
        s[i] = s[i] * 7;
    }
}

int main() {
    char stroka[255] = "Tip";
    shifrator(stroka);
    deshifrator(stroka);
    printf("%s\n", stroka);
    return 0;
}