OBMEP 2021: Second Phase - Level 1 Exercise 1 On the board, each letter of the word OBMEP represents an integer from 1 to 5. Different letters represent different numbers. Furthermore, each number written on the side of the board is the sum of the values of the letters on the board. corresponding horizontal line. A) Find the value of the letter O. Response: 1 When we add the values from the first line, we have