Input :- AA11 AA11

Keep practicing — related questions

• Input :- AA11 11AA BB22
• Input :- AA11 11AA BB22
• Input :- AA11
• Input :- AA11 11AA BB22
• 1,11,21,1211,1231,__
• Fill in the blank. NOT 1 = _____
• 1231111213
• 1, 11, 21, 1211, ?