"use strict";
    
const main = arg => {
    arg = arg.split("\n");
    const A = arg[0].split("");
    const B = arg[1].split("");
    
    const length = A.length;
    let answer   = [];
    
    for(let i=0; i<length; i++) {
        answer.push(A[i]);
        
        if(B[i]) {
            answer.push(B[i]);
        }
    }
    
    console.log(answer.join(""));
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));