- boneco = "ola. eu sou o joao." 
-   
- def ponto(texto): 
- 	nova = "" 
- 	l=len(texto) 
- 	for i in range(0,l): 
- 		if i==l-1: 
- 			nova+=texto[i] 
- 			return nova  
- 		if texto[i-2]=='.' and i>=2:	 
- 			a = texto[i].upper() 
- 			nova+=a 
- 		else:  
- 			nova=nova+texto[i] 
- 	return nova 
-   
- print (ponto(boneco)) 
				Ym9uZWNvID0gIm9sYS4gZXUgc291IG8gam9hby4iCgpkZWYgcG9udG8odGV4dG8pOgoJbm92YSA9ICIiCglsPWxlbih0ZXh0bykKCWZvciBpIGluIHJhbmdlKDAsbCk6CgkJaWYgaT09bC0xOgoJCQlub3ZhKz10ZXh0b1tpXQoJCQlyZXR1cm4gbm92YSAKCQlpZiB0ZXh0b1tpLTJdPT0nLicgYW5kIGk+PTI6CQoJCQlhID0gdGV4dG9baV0udXBwZXIoKQoJCQlub3ZhKz1hCgkJZWxzZTogCgkJCW5vdmE9bm92YSt0ZXh0b1tpXQoJcmV0dXJuIG5vdmEKCnByaW50IChwb250byhib25lY28pKQ==