#!/bin/sh

#sed script to  join special line which follow ordinary lines
#Assumption:
#First line is ordinary line
#Special line is singular. There are no multiple special lines
#adjoining each other
#quits if first line is a special line or if there are two successive special lines

# Regular expression for ordinary line $1=/[[:digit:]]\+/
# Regular expression for special line $2=/[[:alpha:]]\+/

echo $1

sed -n '
/[a-zA-z][a-zA-Z]*/q
h
:BranchA
n 
/[0-9][0-9]*/{x;p;b BranchA};
#/[a-zA-Z][a-zA-Z]*/{
#H;g;s/\n//g;p;s/.*//;x;d
#}
'