import sys
def strmap(numbers):
base = ord('a')
mapped = [chr(base + (n-1)%26) for n in numbers]
return ''.join(mapped)
for line in sys.stdin:
print(strmap(map(int, line.split())))
aW1wb3J0IHN5cwoKZGVmIHN0cm1hcChudW1iZXJzKToKICAgIGJhc2UgPSBvcmQoJ2EnKQogICAgbWFwcGVkID0gW2NocihiYXNlICsgKG4tMSklMjYpIGZvciBuIGluIG51bWJlcnNdCiAgICByZXR1cm4gJycuam9pbihtYXBwZWQpCgpmb3IgbGluZSBpbiBzeXMuc3RkaW46CiAgICBwcmludChzdHJtYXAobWFwKGludCwgbGluZS5zcGxpdCgpKSkpCg==