~~~

s = input()
a = []
b = []
for i in s:
a.append(i)
for i in range(0,len(a)-1):
b.append(ord(a[i]) + ord(a[i + 1]))
for i in range(-1,0):
b.append(ord(a[i]) + ord(a[i + 1]))
for i in b:
print(chr(i),end = ‘’)

~~~