The second coding device includes a first divider that separates the scrambled user data into at least one group including first and second symbols {HEAD ~ each} with {TAIL ~ first and second interleaved subsequences} 
with
The second coding device includes a first divider that separates the scrambled user data into at least one group including first and second symbols { HEAD ~ each } with { TAIL ~ first and second interleaved subsequences }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL