Enter a list of student names in one line separated by a space. Determine that at least one name in this list starts and ends with the same letter (case insensitive). Implement the program using a while loop and a break statement. Print YES if the condition is met and NO otherwise.

text = input()
t = text.split()

for i in range(len(t)):
  if t[i][0].upper() == t[i][-1].upper():
    print("YES")
    break
  if i == len(t) - 1:
    print("NO")