djrgk,
here is an idea:
NR % 2 != 0 { first = $0 }
NR % 2 == 0 {
print first "/" substr($0,1,1) "/" substr($0,2,1) "/" substr($0,3,4) "/" substr($0,7,6) "/" substr($0,13)
}
print line must be in one line (if wrapped).
Bye!
KP.