# a=[1,2,3,4,5,6]
# a.append(7)
# print(a)



# a=[1,2,3,4,5,6,7,]
# a.remove(3)
# print(a)




# a=[1,2,3,4,5,6]
# print(len(a))




a={'x':25,'y':18,'z':45}
sum=0
for i in a:
    sum=sum+a[i]
print(sum)



a={'x':177,'y':45,'z':89}
sum=0
for i in a:
    sum=sum+a[i]
    print(sum)






