def year(y, m):
    if m == "12":
        m = "01"
        y = int(y) + 1
    else:
        m = int(m) + 1
        if m < 10:
            m = "0" + str(m)
    return y, m
if __name__ == '__main__':
    s = list(input())
    y = "".join(s[0:4])
    m = "".join(s[5:7])
    d = "".join(s[8:10])
    small = ["2", "4", "6", "9", "11"]
    if m in small:
        if d <= "28":
            d = int(d) + 2
            if d < 10:
                d = "0" + str(d)
        elif d == "29":
            y, m = year(y, m)
            d = "01"
        else:
            y, m = year(y, m)
            d = "02"
    else:
        if d <= "29":
            d = int(d) + 2
            if d < 10:
                d = "0" + str(d)
        elif d == "30":
            y, m = year(y, m)
            d = "01"
        else:
            y, m = year(y, m)
            d = "02"
    print("{}/{}/{}".format(y, m, d))