T,A,B=map(int,raw_input().split())
if A>T or B>T:
    print "NO"
elif A==0 and B==0 and T==1:
    print "NO"
else:
    print "YES"
    if A==0 and B==0:
        print "v"
        A+=1
        T-=1
    for i in range(T):
        if A==0:
            if B==1 and i != T-1:
                print "v"
                A+=1
            else:
                print ">"
                B-=1
        elif B==0:
            if A==1 and i != T-1:
                print "<"
                B+=1
            else:
                print "^"
                A-=1
        elif A==1 and B==1:
            if i==T-1:
                print "^>"
            else:
                print ">"
                B-=1
        else:
            print "^>"
            A-=1
            B-=1