s = io.read()
y, m, d = string.match(s, "(%d+)/(%d+)/(%d+)")
y, m, d = tonumber(y), tonumber(m), tonumber(d)
mod = 31
if(m == 4 or m == 6 or m == 9 or m == 11) then
    mod = 30
elseif(m == 2) then
    if(y % 400 == 0) then mod = 29
    elseif(y % 100 == 0) then mod = 28
    elseif(y % 4 == 0) then mod = 29
    else mod = 28 end
end
d = d + 2
if(mod < d) then
    d = d - mod
    m = m + 1
    if(m == 13) then
        m, y = 1, y + 1
    end
end
io.write(string.format("%d/%02d/%02d\n", y, m, d))