Why does my Switch trigger all Cases?

[snippsat]

However, do you know why my code was printing all 3?

Function calls in return dictionary will trigger all call.
Could do it like this.

def f_3OAK():
    print("Hello1.")

def f_4OAK():
    print("Hello2.")

def f_5OAK():
    print("Hello3.")

def case(s_Input):
    return {
        '3OAK': f_3OAK,
        '4OAK': f_4OAK,
        '5OAK': f_5OAK
    }[s_Input]

while True:
    case(input("\nPlease enter the win you wish to search for: "))()