To get full credits for this part, students should write more than $5$ methods $($main method included$)$ to structure the algorithm which remove redundancy. The structure of program must have at least one $3-$level nested method $($main method included$).$ For example, main$()$ calls methodA$(),$ methodA$()$ calls methodB$().$ There is some escape sequences in the lyrics that we must consider for the string literals.