a=[20104,20063,19892,20011,19874,20199,19898,20163,19956,19841] t=str(input()) b=[0]*10 b[int(t[0])]+=1 for i in range(2,200002): b[int(t[i])]+=1 ans1=0 ans2=0 for i in range(10): if b[i]>a[i]: ans1=i if b[i]