how do you find quines?

I really tried hard with python and bash, but I failed...

https://en.wikipedia.org/wiki/Quine_%28computing%29

Easy way:
- Define two strings one after the other. Doesn't matter what they are.
- Write a program to output the contents of string 1, followed by the contents of both strings (surrounded by string quote characters), followed by the contents of string 2.
- Populate string 1 with the contents of the program leading up to the definition of string 1.
- Populate string 2 with the contents of the program following the definition of string 2.
- Format as necessary.

Nobel prize please

puts DATA.read * 2
__END__
puts DATA.read * 2
__END__

>>4
Quines can't take input.

octave quine

a = "ding dong"

^^

argh it lost the quotes...

a =  3

works..