'cron 0 0-23/2 * * *'=>build_test('every other hour from 12am to 11pm','0 0-23/2 * * *'),
'cron 15 0-23/2,10,14 * * *'=>build_test('15 minutes after every other hour from 12am to 11pm, 10am, and 2pm every day','15 0-23/2,10,14 * * *'),
'cron 0,15,30,45 4 * * *'=>build_test('at 4:00am, 4:15am, 4:30am, and 4:45am every day','0,15,30,45 4 * * *'),# exact times are returned
'cron 45,15,30,15,0 4 * * *'=>build_test('at 4:00am, 4:15am, 4:30am, and 4:45am every day','45,15,30,15,0 4 * * *'),
'cron 0,15,30,45 4,6,7,8 * * *'=>build_test('0, 15, 30, and 45 minutes after 4am, 6am, 7am, and 8am every day','0,15,30,45 4,6,7,8 * * *'),# too many exact times
'cron 45,15,30,15,0 4,6,7,8 * * *'=>build_test('45, 15, 30, 15, and 0 minutes after 4am, 6am, 7am, and 8am every day','45,15,30,15,0 4,6,7,8 * * *'),
'cron 5 1,4,6-7 * * *'=>build_test('at 1:05am, 4:05am, 6:05am, and 7:05am every day','5 1,4,6-7 * * *'),
'cron 5 13,5 * * *'=>build_test('at 5:05am and 1:05pm every day','5 13,5 * * *'),
'cron 1-9/2 * * * *'=>build_test('every other minute from 1 to 9 minutes after every hour','1-9/2 * * * *'),
'cron 0 0 * DEC,Jan-feb Sat-Sun'=>build_test('at midnight Saturday through Sunday in December and January through February','0 0 * DEC,Jan-feb Sat-Sun'),
'cron 0/10 0/4 * * 0'=>build_test('0, 10, 20, 30, 40, and 50 minutes after 12am, 4am, 8am, 12pm, 4pm, and 8pm on Sunday','0/10 0/4 * * 0'),
'cron 0/10 0/4 1/3 1/2 0/2'=>build_test('0, 10, 20, 30, 40, and 50 minutes after 12am, 4am, 8am, 12pm, 4pm, and 8pm on the 1st, 4th, 7th, 10th, 13th, 16th, 19th, 22nd, 25th, 28th, and 31st and on Sunday, Tuesday, Thursday, and Saturday in January, March, May, July, September, and November','0/10 0/4 1/3 1/2 0/2'),
'cron * * * * 3/2'=>build_test('every minute on Wednesday and Friday','* * * * 3/2'),