## Version 1
age = 12

if age < 4 :
    tarif = 0
if 4 <= age <= 6 :
    tarif = 18
if 7 <= age <= 12 : 
    tarif = 34
if age >= 13 :
    tarif = 48
    
print(tarif)

## Version 2
age = 12

if age < 4 :
    tarif = 0
elif age <= 6 :
    tarif = 18
elif age <= 12 : 
    tarif = 34
else : 
    tarif = 48
    
print(tarif)