s = 'FOOBARBAZ'
i = 0
f = len(s)-1 # posição do último caracter da string
print('Primeiro charactere:', s[i])
print('Ultimo charactere:', s[f])
cyA9ICdGT09CQVJCQVonCgppID0gMApmID0gbGVuKHMpLTEgICMgcG9zacOnw6NvIGRvIMO6bHRpbW8gY2FyYWN0ZXIgZGEgc3RyaW5nCgpwcmludCgnUHJpbWVpcm8gY2hhcmFjdGVyZTonLCBzW2ldKQpwcmludCgnVWx0aW1vIGNoYXJhY3RlcmU6Jywgc1tmXSk=