21. Spaces and carriage returns, and line feed sequences contained in the character string become separators in the list. 22. These companies also have thousands of phone lines on which they'll have to pay the higher per-line fees . 23. Lines are delimited by carriage returns and line feed sequences ( they are logical lines, not physical lines ). 24. Only four specific characters are considered whitespace for this purpose : space, horizontal tab, line feed , and carriage return. 25. Each line feed covered a narrow frequency band : 2 5 % of the center frequency of the band. 26. The agency declined to provide details, but said some private companies have yet to pay interconnection charges and leased-line fees . 27. RFC 2822 refers to control characters that do not include carriage return, line feed or white space as non-whitespace control characters. 28. Switching between the columns was accomplished by moving to the very last line in any given column and pressing line feed . 29. For voice mail there is a $ 200 one-time initiation fee plus $ 15 per line fee each month to forward calls. 30. Do search and replace, changing CONTROL ALT R ( an arrow ) to LINE FEED and CONTROL ALT R ( an arrow) 