NFA

#bai 1
import re

f = open("B1.txt")
S = f.read().split("\n")
for e in S:
    if re.match(r"(^[tc])", e):
       if re.findall(r"re\w*", e):
            print(e)
 f.close()
 
 #Bai 2
 import re

 f = open("B1.txt")
 S = f.read().split("\n")
 for e in S:
     if re.search(r"[a-z0-9A-Z].{25}", e):
         print(e)

 f.close()
 
 #bai 3
 import re

 f = open("B1.txt")
 S = f.read().split("\n")
 for e in S:
     if re.search(r"[?!]$", e):
         print(e)
f.close()