I don’t understand the problem, I can’t solve it, explain the solution?

Question

Python

The program is served 5
Python
is great C# is a great programming language
Stepik is a great platform
BEEGEEK FOREVER!
Python was born on February 20, 1991
allsearch
= []
allr = []
for i in range(int(input())):
r = input()
allr += [r]
search = input()
if search.lower() in r.lower():
allsearch += [r]
print(*allsearch, sep='')

Deduces the Python language appeared on February 20, 1991
and it is necessary Python language is beautiful
C # - an excellent programming
language Python language appeared on February 20, 1991

Answer 1

input_list = []

row_count = int(input('Введи количество строк:'))
for i in range(row_count):
    string = input('Введи строку:').lower()
    input_list.append(string)

search = input('Введи поисковый запрос:').lower()

for r in input_list:
    if search in r:
        print(r)