C3l4Thl_0r1F5dnv_l}{035 - what is the encryption method?

Question

Information Security

There is an encrypted string: C3l4Thl_0r1F5dnv_l}{035
Can you help me, what kind of encryption is used? I understand that there seems to be a character-by-character shift, but I can’t catch the pattern

PS flag format CTF {flag}