Using the Grammar Rules
lGrammar rules:
1.S ¨ ab
2.S ¨ aSb
3.S ¨ SS
lExample derivations of strings in the language:
1.S Þ ab
2.S Þ aSb Þ aabb
3.S Þ aSb Þ aaSbb Þ aaabbb
4.S Þ SS Þ abS Þ abab
5.S Þ SS Þ SSS Þ ababab
6.S Þ SS Þ aSbS Þ aabbS Þ aabbaSb Þ aabbaabb