good names for these functions

[Skaperen]

def foo(s,n):
    ??????????
def bar(s,n):
    ??????????
def boo(s,n):
    ??????????
def far(s,n):
    ??????????
a=[x for x in range(10)]
for z in foo(a,3):
    print(*z)
print()
for z in bar(a,4):
    print(*z)
print()
for z in boo(a,3):
    print(*z)
print()
for z in far(a,4):
    print(*z)

Output:
0 1 2
1 2 3
2 3 4
3 4 5
4 5 6
5 6 7
6 7 8
7 8 9
8 9
9

0 1 2
3 4 5
6 7 8
9

0 1 2
1 2 3
2 3 4
3 4 5
4 5 6
5 6 7
6 7 8
7 8 9

0 1 2
3 4 5
6 7 8

there are 4 different functions with similarities and differences. i'm trying to come up with a good name scheme for these.