1 2 3

{}
1
1 2
1 2 3
1 3
2
2 3
3

nums=sorted(map(int,input().split()))
result=[]
def dfs(idx,path):
    result.append(path[:])
    for i in range(idx,len(nums)):
        path.append(nums[i])
        dfs(i+1,path)
        path.pop()
dfs(0,[])
for r in result: print(*r) if r else print('{}')