def 表(f,x):
    for X in range(x):
        yield (X,f(X))
def Recursion(f,n,x):
    P = [n]
    yield (0,n)
    for X in range(x):
        yield (X+1,f(P[-1]))
        P.append(f(P[-1]))
def D(f):
    return (lambda x,k=f:k(x)-k(x-1))

for x,y in Recursion((lambda x:(x*(1+(1/2)))),1.1,9999999):
    try:
        print(f"{x}:{y}")
    except:
        break