import sys
readline=sys.stdin.readline

X,Y,Z=map(int,readline().split())
ans="NO"
for x in range(-4999,5000):
    if (Z-x*X)%Y:
        continue
    y=(Z-x*X)//Y
    if abs(x)+abs(y)<=4999:
        if x>0:
            ans="w"*abs(y)+"c"+"cC"*(x-1)+("C"*y if y>=0 else "W"*(-y))
        else:
            ans="c"*abs(x)+"w"+"wC"*(y-1)+("C"*x if x>=0 else "W"*(-x))
        break
print(ans)