a="cagy"
b=3
c = ""
for i in range(len(a)):
    if ord(a[i]) + b < ord('z'):
        c += chr(ord(a[i]) + b)
    else:
        c += chr(ord(a[i]) + b - 26)
print(c)
7c5868aaf0f26066d56aee97f4b21a20b32fbbcd
<mask token>

<mask token>
for i in range(len(a)):
    if ord(a[i]) + b < ord('z'):
        c += chr(ord(a[i]) + b)
    else:
        c += chr(ord(a[i]) + b - 26)
print(c)

a = 'cagy'
b = 3
c = ''
for i in range(len(a)):
    if ord(a[i]) + b < ord('z'):
        c += chr(ord(a[i]) + b)
    else:
        c += chr(ord(a[i]) + b - 26)
print(c)

a="cagy"
b=3
c = ""
for i in range(len(a)):
    if ord(a[i]) + b < ord('z'):
        c += chr(ord(a[i]) + b)
    else:
        c += chr(ord(a[i]) + b - 26)
print(c)