#!/usr/bin/python3
# Auswahl aus mehreren Fällen
def f_a():
    print("Decision: case a")
def f_b():
    print("Decision: case b")
def f_c():
    print("Neither a nor b")
dic = {
"a": f_a,
"b": f_b,
}
print("a for function f_a")
print("b for function f_b")
x = input("Enter a or b: ")
dic.get(x,f_c)()