original: 12 - hour clock times end with dotted or undotted lower-case or, or or, which are spaced (or, not or).
simplifications: 12 - hour clock times end with dotted or undotted lower-case or, or or, which are spaced. 12 - hour clock times end with dotted or undotted lower-case mark. 12 - hour clock times end with dotted or undotted lower-case. Another ending is or or. 12 - hour clock times end with dotted or undotted lower-case or, or or. They are spaced (or, not or). Clock times in 12 hours end up spaced lower case letters. 12-hour clock  times end with lower-case or, or, or, which are spaced out. 12 - hour clock times end with the lower-case letters o and r. There is a space between the o and r. The 12-hour clock times end with dotted or undotted lower-case which are sometimes spaced. 12 - hour clock times end with a space and is followed by a.m. or p.m.  The latter may be dotted or undotted lower-case. 12-hour clock times end with dotted or undoted lower case or or or spaced (or not or not).