B. Email from Polycarp

time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output

Methodius received an email from his friend Polycarp. However, Polycarp’s keyboard is broken, so pressing a key on it once may cause the corresponding symbol to appear more than once (if you press a key on a regular keyboard, it prints exactly one symbol).

For example, as a result of typing the word “hello”, the following words could be printed: “hello”, “hhhhello”, “hheeeellllooo”, but the following could not be printed: “hell”, “helo”, “hhllllooo”.

Note, that when you press a key, the corresponding symbol must appear (possibly, more than once). The keyboard is broken in a random manner, it means that pressing the same key you can get the different number of letters in the result.

For each word in the letter, Methodius has guessed what word Polycarp actually wanted to write, but he is not sure about it, so he asks you to help him.

You are given a list of pairs of words. For each pair, determine if the second word could be printed by typing the first one on Polycarp’s keyboard.

Input

The first line of the input contains one integer nn (1≤n≤1051≤n≤105) — the number of pairs to check. Further input contains nn descriptions of pairs.

The first line of each description contains a single non-empty word ss consisting of lowercase Latin letters. The second line of the description contains a single non-empty word tt consisting of lowercase Latin letters. The lengths of both strings are not greater than 106106.

It is guaranteed that the total length of all words ss in the input is not greater than 106106. Also, it is guaranteed that the total length of all words tt in the input is not greater than 106106.

Output

Output nn lines. In the ii-th line for the ii-th pair of words ss and tt print YES if the word tt could be printed by typing the word ss. Otherwise, print NO.

Examples input Copy

4
hello
hello
hello
helloo
hello
hlllloo
hello
helo

output Copy

YES
YES
NO
NO

input Copy

5
aa
bb
codeforces
codeforce
polycarp
poolycarpp
aaaa
aaaab
abcdefghijklmnopqrstuvwxyz
zabcdefghijklmnopqrstuvwxyz

output Copy

NO
NO
YES
NO
NO

#include<iostream>
#include<string.h>
#include<string>
#include<algorithm>
using namespace std;
string s1, s2;
int main()
{
    int t;
    cin >> t;
    while (t--)
    {
        int flag = 0;
        cin >> s1 >> s2;
        int i = 0, j = 0;
        if (s1.size() > s2.size())
            flag = 1;
        else
        {
            for (; s2[j]; j++, i++)
            {
                if (s1[i] != s2[j])
                {
                    if (i == 0)
                    {
                        flag = 1;
                        break;
                    }
                    else
                    {
                        if (s2[j] == s2[j - 1])
                            i--;//如果s2有重复的字母，那么s1[i]保持不变，继续比较s[j+1]
                        else
                        {
                            flag = 1;
                            break;
                        }

                    }
                }

            }
        }
        if (flag == 0 && i == s1.size())
            cout << "YES" << endl;
        else
            cout << "NO" << endl;
    }
    return 0;
}