add letters to hours minutes and seconds

[qw123wh]

Show written min or m for minutes, sec or s for seconds, and hou or h for hours in the call log.

Example 8 seconds now 00.08 appears while I would like 8 seconds or 8 seconds, the same for minutes and hours. Because for example I use 24 hours and if I make a call at 19:12 that lasts 18 minutes and 15 seconds I see 19:12 and 18:15 and I don't understand anything while I saw 19:12 and 18 min 15 second or 18 m 15 s then I get it