help with loop of upper & lower letters

[Thekid]

I had made a post about making a loop using letters instead of numbers and dshimer gave me this solution:

for i in range(65,70):
    for j in range(65,70):
        for k in range(65,70):
            print chr(i),chr(j),chr(k)

which used an example I had posted using numbers. That code works (thanks dshimer) but after toying with it I see that I am going about it in a method that takes a long time to run through and I also need uppers in the loop. I need a loop that will print out like this:
aaaaa
aaaaA
aaaAa
aaAaa
ans so on through every combination. I now have this portion which seems closer but still not quite there:

from string import letters
#my 'lowers' list has extra chars at the end so I have to trim it
lowers = letters[26:52]
uppers = letters[:26]
for lower in lowers:
    for upper in uppers:
        print lower,upper

a A
a B
a C
a D

So my question is how can I get this to run through with 5 values and through every combination, without doing something like this:

for lower in lowers:
    for upper in uppers:
        print lower,lower,lower,lower,upper
        print lower,lower,lower,upper,lower

[bvdet]

Try this:

def permute5(a):
    b = [(v,w,x,y,z) for v in a for w in a for x in a for y in a for z in a]
    c = ["".join(z) for z in b]
    return b,c

b, c = permute5('abcABC')

print "\n".join(c)

Partial output:
>>> aaaaa
aaaab
aaaac
aaaaA
aaaaB
aaaaC
aaaba
aaabb
aaabc
aaabA
aaabB
aaabC
aaaca
aaacb
aaacc
aaacA
aaacB
aaacC
aaaAa
............... ...
CCCcC
CCCAa
CCCAb
CCCAc
CCCAA
CCCAB
CCCAC
CCCBa
CCCBb
CCCBc
CCCBA
CCCBB
CCCBC
CCCCa
CCCCb
CCCCc
CCCCA
CCCCB
CCCCC
>>>

[Thekid]

Wow....that's great! Thanks!