#include <cstdio>

int days[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

int main() {
    char S[11];
    int Y, M, D;

    scanf("%s", S);
    sscanf(S, "%d/%d/%d", &Y, &M, &D);

    if (Y % 4 == 0 and Y % 100 != 0 or Y % 400 == 0) days[2] = 29;

    D += 2;
    if (days[M] < D) {
        D -= days[M];
        M++;
        if (12 < M) {
            Y++;
            M = 1;
        }
    }

    printf("%04d/%02d/%02d\n", Y, M, D);
    return 0;
}