a=b=c=10
print(a,b,c)
print(id(a),id(b),id(c))
a=20
print(a,b,c)
print(id(a),id(b),id(c))

a=b=c=[1,2,3]
print(a,b,c)
print(id(a),id(b),id(c))
a.append(4)
print(a,b,c)
print(id(a),id(b),id(c))


x=10
y=10
print(id(x),id(y))
y=y+1-1
print(id(x),id(y))
y=y+1234567890-1234567890
print(id(x),id(y))


