Divide a string every N characters
awk '{gsub(/.{2}/,"& ")}1' file
How to print between two lines of specified strings
# print from string1 to string2 including the matched lines
awk '/string1/{f=1} /string2/{f=0;print} f'
awk '/string1/{f=1} f; /string2/{f=0}'
awk '/string1/,/string2/'
# print from string1 to string2 ignoring the matched lines
awk '/string1/{f=1;next} /string2/{f=0} f'