Program code is correct but fails with the test cases...can any help with this..

Write a code to get the input in the given format and print the output in the given format

Input Description:
A single line contains a string.

Output Description:
Print the characters in a string separated by space.

My code:

data = str(input())
st = ""
for i in range(0,len(data)):
    st = st + data[i] + " "
print(st)

Sample Input :
guvi

Sample Output :
g u v i