MAX = 100000000

def bsearch(min, max, target):
    while min < max:
        middle = (min + max) // 2
        if middle == target:
            return middle
        elif middle < target:
            min = middle + 1
        elif target < middle:
            max = middle -1
        else:
            return -1

def encode(p, q, negative):
    code = []

    if positive:
        for _ in range(p):
            code.append('c')
        for _ in range(q):
            code.append('w')
        for _ in range(p+q-1):
            code.append('C')
    else:
        for _ in range(q):
            code.append('w')
        for _ in range(p):
            code.append('c')
        for _ in range(p-1):
            code.append('C')
        for _ in range(q):
            code.append('W')
    
    return ''.join(code)
        
X,Y,Z = list(map(int, input().split()))

# p * X + q * Y = Z
coef = None
positive = True
for p in range(MAX+1):
    rest = Z - p * X
    if rest % Y == 0:
        target = rest // Y
        if target < 0:
            positive = False
        q = bsearch(0, MAX+1, abs(target))
        if q != -1:
            coef = (p,q)
            break
        
if coef:
    p,q = coef
    code = encode(p, q, positive)
    if 10000 < len(code):
        print('NO')
    else:
        print(code)
else:
    print('NO')