Secret password

After creating an account on the eolymp platform a few years ago, Khizri decided to save his password so that he would not forget it. However, so that others could not intercept his password, he wrote down separately in a notebook the characters of his password standing in odd positions in one place, and in even positions in another.

You finally found these notes today, and now it's time to intercept Khizri's password.

You are given the strings t and c. The string t consists of characters in odd positions, and the string c consists of characters in even positions. Both lines list the characters in the same order as the characters in Khizri's password.

Input

The first line gives t , the second line gives c. It is known that

• 1 ≤ |t|, |c| ≤ 50,

• |t| − |c| = 0 or 1;

• strings t and c consist only of lowercase English letters('a' ... 'z')

Note: Here |s| denotes the length of the string s.

Output

Print Khizri's password.

Examples

Note

Khizri's password is gizliparol. For this password if you type odd characters together, you get gziao, and if you type even characters together, you get ilprl.