import math

def main():
    A, B = map(int, input().split(' '))
    
    while A <= B:
     if A % 3 == 0:
        print(A)
     else:
         c = math.log10(B)
         c = math.floor(c)
         for num in range(c + 1):
               d = A // (10 ** num)
               if d % 10 == 3:
                 print(A)
                 break
     A = A + 1           
             
 
if __name__ == '__main__':
    main()