module Main
  ( main
  )
where

import           Control.Applicative
import           Control.Monad
import           Data.List
import           Data.Array
import           Data.Char

main = do
  o <- getLine
  e <- getLine
  putStrLn $ decode o e

decode::String -> String -> String
decode (x:xs) (y:ys) = x:y:decode xs ys
decode x [] = x
