using {HEAD ~ the tested angular difference} between the first test toe angle and {TAIL ~ the second test toe angle} to determine whether the tested angular difference is within the alignment range 
between
using { HEAD ~ the tested angular difference } between the first test toe angle and { TAIL ~ the second test toe angle } to determine whether the tested angular difference is within the alignment range
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH