In some cases, {HEAD ~ the period} of {TAIL ~ time} may be in the range of 1 second to 5 minutes, such as, for example, 1 second, 2 seconds, 3 seconds, 10 seconds, 20 seconds, 30 seconds, or 1 minute 
In some cases , { HEAD ~ the period } of { TAIL ~ time } may be in the range of 1 second to 5 minutes , such as , for example , 1 second , 2 seconds , 3 seconds , 10 seconds , 20 seconds , 30 seconds , or 1 minute
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH