py lab 3

#1
print("Conditions: line length >= 3")
s = input("Enter line: ")
n = len(s)
while (n < 3):
  print("ERROR: line length too short ")
  print("Enter line again: ")
  s = input("Enter line: ")
  n = len(s)

print(f"Result: {s[n-3:]}")

#2
s = input("Enter line: ")
n = len(s)
new_s = ""
for i in range(n):
  if (s[i].isalpha()):
    new_s += s[i]
print(f"Result: {new_s}")

#3
s = input("Enter line: ")
a = s.split(' ')
print(a)
for i in range(len(a)):
  print(f"Word {i+1}: {a[i]}")