How could I manipulte font look and characters symbols of subject field Т̺̞̐̂̒́̿е̱̠̝̯л̥е̠̗͍̭̩͑ͪ̑фо̤̗̠̊̃͌̐͐ͧн͎̲͍̊̋̉ͮ̓̇ъͮ͋ͣͧ̚̚т̱͔̹̽ ͗

Question

Today I receive mail with following text as subject:

Т̺̞̐̂̒́̿е̱̠̝̯л̥е̠̗͍̭̩͑ͪ̑фо̤̗̠̊̃͌̐͐ͧн͎̲͍̊̋̉ͮ̓̇ъͮ͋ͣͧ̚̚т̱͔̹̽ ̟͗ͤ̅͛т̣͔̔̅ͅи̲̺͎͖̻̻ͨͨ ̗̹̹̖ͮͫ̅̎̄с̝͉̮̤̩̑̏̌͌̂ͪе͍͇̩̣͇̠ͪͅ ̭̻ͣ̈́̾͒̽͆̃б̳͈͖̱̺̰̓̓̈́̓ͪ̍ъ̜͇̠̯з̪̻̱͂̏и̙̞͇͙̲̂̈́ͥ͛̑͂к̥̜ͩӑ͓͙̹̩̬͎̩͆ͥ̅ͭ?̝̲̏ͮ́ͦ̇̃̚

and it looks the same on all applications I copied it.

So could someone explain how could be achieved such effect or what was done to characters to look like that on different fonts.