Can anyone suggest me single line command (specially sed or AWK) to divide each line of given file in equal number of part. For example divide each line in 4 or 3 equal part.

Example:

Input:

ATGCATHLMNPHLNTPLML

ALHCAPHLMNPHLNTPLMLG

Output:

ATGCA THLMN PHLNT PLML

ALHCA PHLMN PHLNT PLMLG