str=[int(i) for i in input().split()]
list=[]
n=len(str)
if len(str) == 0 : exit()
if len(str) == 1 :
list.insert(0,str)
print(int(str[0]))
exit()
for i in range(1,n-1):
list.insert(i,(str[i-1]+str[i+1]))
#print(list)
exit
first = str[-1]+str[1]
list.insert (0,first)
#print(list)
last = str[-2]+str[0]
list.append(last)
#print(list)
for i in list:
print(i, end=" ")
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