n,m,l=map(int,input().split())
nn=[]
mm=[]
ll=[]
for i in range(1,n+1):
    pp=input()
    nn.append(pp)
for i in range(1,m+1):
    pp=input()
    mm.append(pp)
for i in range(1,l+1):
    pp=input()
    ll.append(pp)
for i in mm:
    nn.remove(i)
for i in ll:
    nn.append(i)
nn.sort()
for i in nn:
    print(i)

测试点