sol = []
while True:
    ch = raw_input().split(' ')
    if (ch[0] == '0' and ch[1] == '0' and ch[2] == '0'):
        break;
    s2 = ''
    for i in range(len(ch[0])):
        if ch[0][i] != ch[1][0]:
            s2 += ''.join(ch[0][i])
        else:
            s2 += ''.join(ch[2])

    if s2[0]!='0':
        sol.append(s2)
    else:
        i = 0
        while s2[i] == '0':
            i+=1
        sol.append(s2[i:len(s2)])

for i in range(len(sol)):
    print sol[i]