print((function (f, g)
	local h,t = f(),g(tonumber)
	if h[t.d] then h[t.d](t) end
	return ("%d/%02d/%02d"):format(t.y,t.m,t.d)
end)(function ()
	function isLY(t) return t.y%100==0 and t.y%400==0 or t.y%4==0 end
	function is30(t) return t.m==4 or t.m==6 or t.m==9 or t.m==11 end
	return {
		[29] = function (t) if t.m==2 and (not isLY(t)) then t.m,t.d = 3,1 end end;
		[30] = function (t) if t.m==2 then t.m,t.d = 3,isLY(t) and 1 or 2 end end;
		[31] = function (t)
			if t.m==2 then t.m,t.d = 3,2
			elseif is30(t) then t.m,t.d = t.m+1,1
			end end;
		[32] = function (t)
			if t.m==12 then t.y,t.m,t.d = t.y+1,1,1
			elseif is30(t) then t.m,t.d = t.m+1,2
			else t.m,t.d = t.m+1,1
			end end;
		[33] = function (t)
			if t.m==12 then t.y,t.m,t.d = t.y+1,1,2
			elseif is30(t) then t.m,t.d = t.m+1,3
			else t.m,t.d = t.m+1,2
			end end
	}
end, function (f)
	local y,m,d = io.stdin:read("*l"):match("(%d+)%/(%d+)%/(%d+)")
	return { y=f(y); m=f(m); d=f(d)+2 }
end))