x, y, z = map(int, input().split())
code = 'NO'
minA = None
minB = None
min = 5000

for a in range(-5000, 5001):
  if y == 0:
    b = float(z - a * x)
  else:
    b = (z - a * x) / y
  if b.is_integer() == True and abs(a) + abs(b) <= 5000 and min >= abs(a) + abs(b):
    b = int(b)
    min = abs(a) + abs(b)
    minA = a
    minB = b
    
a = minA
b = minB

if a == None and b == None:
  code = 'NO'
elif a <= 0 and b <= 0 and abs(a) + abs(b) <= 4997:
  code = 'c' * (abs(a) + 2) + 'w' * abs(b) + 'W' * (abs(a) + abs(b) + 1)
elif a >= 0 and b >= 0:
  code = 'c'*a + 'w'*b +'C'*(a+b-1) 
elif a <= 0 and b >= 0:
  code = 'c' * abs(a) + 'w' * b + 'C' * (b - 1) + 'W' * abs(a)
elif a >= 0 and b <= 0:
  code = 'c' * a + 'w' *  abs(b) + 'C' * (a - 1) + 'W' *  abs(b)
else:
  print('error')

if code == 'NO':
  print('NO')
else:
  print(code)