``` python
def combination(numlist, m, low=0):
if m==0:
yield []
else:
for i in range(low, len(numlist)):
for rest in combination(numlist, m - 1, i + 1):
yield [numlist[i]] + rest

def combinations(numlist, m):
return list(combination(numlist, m))
numlist = [1, 2, 3, 4, 5]
print(combinations(numlist, 3))
```