#first challenge
a=10;
b=50;
c=100;
div=a/10;
multi=b*50;
add=c+60;
print("div:",div);
print("multi:",multi);
print("add:",add);
#seond challenge
str="aeiou";
print(str.replace('o','G'));
#third challenge
a=150;
b=33.4;
print(float(a));
print(int(b));
