if __name__ == '__main__':
    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
            if len(s2)>0:
                while s2[i] == '0':
                    i+=1
                    if i == len(s2):
                        i-=1
                        break
            else:
                s2 = '0'
            sol.append(s2[i:len(s2)])

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