Level 1508 - 3 Letters

Here's the 3 letter solution for Level 1508 in 4 Pics 1 Word

4 pics 1 Word Level 1508 Image 1 4 pics 1 Word Level 1508 Image 2 4 pics 1 Word Level 1508 Image 3 4 pics 1 Word Level 1508 Image 4
C
U
B