printing in columns

Hi!
I'm working with arrays and I get them column by column and need to print them. I as there a way to print in columns?
for example:
I produce an array of A, B and C from a loop and then need to print them in one column and the go to the next column ....
so in the end I shall have an output like this:
A E
B F
C G
D h
... ...

my arrays are too long (over 50K) so I cant just store the arrays and then print them. I need to produce each column array, print them and delete it and go to the next column.
Hope I explained well :)
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