x,y,z=map(int,input().split())

if x==0:
    if z%x==0:
        k=z//x
        ANS=["w"]*k+["C"]*(k-1)
    else:
        print("NO")
        exit()

    if len(ANS)<=10000:
        print("".join(ANS))
    else:
        print("NO")
    exit()

if y==0:
    if z%y==0:
        k=z//y
        ANS=["c"]*k+["C"]*(k-1)
    else:
        print("NO")
        exit()

    if len(ANS)<=10000:
        print("".join(ANS))
    else:
        print("NO")
    exit()


b=1<<60
for a in range(-5000,5001):
    # ax+by=z

    if (z-a*x)%y==0:
        b=(z-a*x)//y

        if abs(a)+abs(b)<=5000:
            break

if b==1<<60 or abs(a)+abs(b)>5000:
    print("NO")
    exit()

if a>=0 and b>=0:
    ANS=["c"]*a+["w"]*b+["C"]*(a+b-1)
elif a<0 and b>=0:
    ANS=["c"]*abs(a)+["w"]*b+["C"]*(b-1)+["W"]*abs(a)
else:
    ANS=["w"]*abs(b)+["c"]*a+["C"]*(a-1)+["W"]*abs(b)

print("".join(ANS))