Problem:
Score : 100 points

Problem Statement

On some day in January 2018, Takaki is writing a document. The document has a column where the current date is written in yyyy/mm/dd format. For example, January 23, 2018 should be written as 2018/01/23.

After finishing the document, she noticed that she had mistakenly wrote 2017 at the beginning of the date column. Write a program that, when the string that Takaki wrote in the date column, S, is given as input, modifies the first four characters in S to 2018 and prints it.

Constraints

S is a string of length 10.

The first eight characters in S are 2017/01/.

The last two characters in S are digits and represent an integer between 1 and 31 (inclusive).

Input

Input is given from Standard Input in the following format:

S

Output

Replace the first four characters in S with 2018 and print it.

Sample Input 1

2017/01/07

Sample Output 1

2018/01/07

Sample Input 2

2017/01/31

Sample Output 2

2018/01/31

Solution in Ruby (2.3.3) (judge verdict: Runtime Error)

# 全部出す版
N,H=gets.chomp.split(' ').map{|n| n.to_i}
a = Array.new(N) { |i| 0 }
b = Array.new(N) { |i| 0 }
0.upto(N-1){|i|
	a[i], b[i] = gets.chomp.split(' ').map{|n| n.to_i}
}
amax = a.sort{|a,b| b <=> a}[0]
dmg = 0
atknum = 0
b.select{|bi| bi > amax}.sort{|a,b| b <=> a}.each{|bi|
	dmg += bi
	atknum += 1
	if(dmg >= H)
		puts "#{atknum}"
		break
	end
}
if(dmg < H)
	#amax = a.sort[0]
	remdmg = H - dmg
	atknum += remdmg / amax
	if(remdmg % amax != 0)
		atknum += 1
	end
	puts "#{atknum}"
end