def _rm_is_header_line(parts, n):
if (n == <NUM_LIT:15> and parts[<NUM_LIT:8>] == "<STR_LIT:C>"):<EOL><INDENT>return True<EOL><DEDENT>if (n == <NUM_LIT> and parts[<NUM_LIT:0>].isdigit()):<EOL><INDENT>return True<EOL><DEDENT>
determine whether a pre-split string is a repeat-masker alignment header.

headers have no special structure or symbol to mark them, so this is based
only on the number of elements, and what data type they are.