t, a, b = map(int, input().split())
if a > t or b > t:
    print("NO")
    exit()
aa = t - (t - a) % 2
bb = t - (t - b) % 2
ANS = []
u, r = 0, 0
if aa < t and bb < t:
    for i in range(t):
        res = ''
        if i == 0:
            res += '^'
            u += 1
        elif i == t - 1:
            if r < b:
                res += '>'
                r += 1
            else:
                res += '<'
                r -= 1
        else:
            if u < a:
                res += '^'
                u += 1
            else:
                if u == a:
                    res += '^'
                    u += 1
                else:
                    res += 'v'
                    u -= 1
            if r < b:
                res += '>'
                r += 1
            else:
                if r == b:
                    res += '>'
                    r += 1
                else:
                    res += '<'
                    r -= 1
        ANS.append(res)
else:
    for i in range(t):
        res = ''
        if i == 0:
            if aa == t:
                res += '^'
                u += 1
            if bb == t:
                res += '>'
                r += 1
        else:
            if u < a:
                res += '^'
                u += 1
            else:
                if u == a:
                    res += '^'
                    u += 1
                else:
                    res += 'v'
                    u -= 1
            if r < b:
                res += '>'
                r += 1
            else:
                if r == b:
                    res += '>'
                    r += 1
                else:
                    res += '<'
                    r -= 1
        ANS.append(res)
if u == a and r == b:
    print("YES")
    print(*ANS, sep='\n')
else:
    print("NO")