You are given three strings A, B and C. Check whether they form a word chain.

More formally, determine whether both of the following are true:

* The last character in A and the initial character in B are the same.
* The last character in B and the initial character in C are the same.



If both are true, print `YES`. Otherwise, print `NO`.

Constraints

* A, B and C are all composed of lowercase English letters (`a` - `z`).
* 1 ≤ |A|, |B|, |C| ≤ 10, where |A|, |B| and |C| are the lengths of A, B and C, respectively.

Input

Input is given from Standard Input in the following format:


A B C


Output

Print `YES` or `NO`.

Examples

Input

rng gorilla apple


Output

YES


Input

yakiniku unagi sushi


Output

NO


Input

a a a


Output

YES


Input

aaaaaaaaab aaaaaaaaaa aaaaaaaaab


Output

NO
import Foundation

#if swift(>=4.0)
extension String {
    func split(by separator: String) -> [String] {
        return self.components(separatedBy: separator)
    }
    func toArray() -> [String] {
        return self.map{String($0)}
    }
}
#else
extension String {
    func split(by separator: String) -> [String] {
        return self.componentsSeparatedByString(separator)
    }
    func count() -> Int {
        return self.characters.count
    }
    func toArray() -> [String] {
        return self.characters.map{String($0)}
    }
}
extension Array where Element: Comparable {
    func max() -> Element! {
        return self.maxElement()
    }
    func min() -> Element! {
        return self.minElement()
    }
    func sorted() -> Array {
        return self.sort()
    }
    func reversed() -> Array {
        return self.reverse()
    }
    mutating func sort() {
        self.sortInPlace()
    }
}
extension Array {
    init(repeating: Element, count: Int) {
        self.init(count: count, repeatedValue: repeating)
    }
}
func stride<T: Strideable>(from start: T, to end: T, by stride: T.Stride) -> StrideTo<T> {
    return start.stride(to: end, by: stride)
}
#endif
func readInt() -> Int? {
    return Int(readLine()!)
}
func readStringSplit(by separator: String) -> [String] {
    return readLine()!.split(by: separator)
}
func readIntSplit(by separator: String) -> [Int] {
    return readLine()!.split(by: separator).map{Int($0)!}
}

/*************** テストスペース ***************/



/*************** メインプログラム ***************/

let input = readStringSplit(by: " ").map{$0.toArray()}
let (A, B, C) = (input[0], input[1], input[2])
print(A[A.count()-1]==B[0]&&B[B.count()-1]==C[0] ? "YES" : "NO")
