s = input()
ans = []
flag = False
for i in range(len(s)):
    if flag:
        ans.append("5")
    else:
        if int(s[i]) < 4:
            t = 0
            if len(ans) > 0 and ans[-1] == "5":
                ans[-1] = "4"
                ans.append("5")
                flag = True
                continue
            while len(ans) > 0 and ans[-1] == "4":
                ans.pop()
                t += 1
                if len(ans) > 0 and ans[-1] == "5":
                    ans[-1] = "4"
                    ans.extend(["5"] * (t + 1))
                    flag = True
                    break
            else:
                ans = ["5"] * t
                flag = True 
        elif int(s[i]) > 5:
            ans.append("5")
            flag = True
        else:
            ans.append(s[i])
print("".join(ans))