{HEAD ~ Data} on {TAIL ~ the interleave path} is interleaved by interleaver if an interleave depth is >2 
on
{ HEAD ~ Data } on { TAIL ~ the interleave path } is interleaved by interleaver if an interleave depth is > 2
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH