sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What can I do to reduce my belly?
 sentence 2: What is the way to reduce the fat on belly? sentence 1: Is there any difference between LNCTE and LNCT in terms of placement?
 sentence 2: What is the difference in LNCT and LNCTS in terms of placement?
not same meaning
same meaning
not same meaning