m,n = map(int,input().split());
for i in range (m, n+1):
    a = i // 1000
    b = i // 100 % 10
    c = i // 10 % 10
    d = i % 10
    if a == 0 and b - c == c -d:
        print(i)
    elif a - b == b -c and b -c == c - d:
        print(i)
/**************************************************************
	Problem: 1466
	User: admin
	Language: Python
	Result: Accepted
	Time:197 ms
	Memory:34480 kb
****************************************************************/