#!/usr/bin/env python3


LEFT = "<"
RIGHT = ">"
UP = "^"
DOWN = "v"


def main():
    t0, r, c = map(int, input().split())
    if t0 < r or t0 < c or t0 + r + c == 1:
        print("NO")
        return
    print("YES")
    for t in range(1, t0 + 1)[::-1]:
        if r < t - 1:
            print(DOWN, end="")
            r += 1
        elif r:
            print(UP, end="")
            r -= 1
        if c % 2 == t % 2:
            if c < t - 1:
                print(LEFT, end="")
                c += 1
            elif c:
                print(RIGHT, end="")
                c -= 1
        print()


if __name__ == '__main__':
    main()