Problem:
Score : 100 points

Problem Statement

Given is a three-digit integer N. Does N contain the digit 7?

If so, print Yes; otherwise, print No.

Constraints

100 \leq N \leq 999

Input

Input is given from Standard Input in the following format:

N

Output

If N contains the digit 7, print Yes; otherwise, print No.

Sample Input 1

117

Sample Output 1

Yes

117 contains 7 as its last digit.

Sample Input 2

123

Sample Output 2

No

123 does not contain the digit 7.

Sample Input 3

777

Sample Output 3

Yes

Solution in Lua (LuaJIT 2.1.0) (judge verdict: Accepted)

local N = io.read("*l")

local isYes = false
for i = 1, 3 do
    if N:sub(i, i) == "7" then
        isYes = true
    end
end

print(isYes and "Yes" or "No")