while(1):
    try:
        s1 = input()
        s0 = input()
        s2=s0[::-1]
        l1=len(s1)
        l2=len(s2)
        ss=''
        ml=min(l1,l2)
        for i in range(ml):
            ss+=s1[i]+s2[i]
        while(ml<l1):
            ss+=s1[ml]
            ml+=1
        while(ml<l2):
            ss+=s2[ml]
            ml+=1
        print(ss)
    except:
        break