Taxes

Source: beecrowd

Version: Phuoc Hung OJ Extended

Problem Statement

Income up to $2000.00$ is tax-free. The portion above $2000.00$ up to $3000.00$ is taxed at $8\%$, the portion above $3000.00$ up to $4500.00$ at $18\%$, and the portion above $4500.00$ at $28\%$. Tax is progressive by bracket.

Input

One line contains the income with two digits after the decimal point.

Output

If no tax is due, print Isento. Otherwise print R$ followed by the tax with exactly two decimal places.

Subtasks

• Subtask 1 (100%): $0 \le income \le 10^{12}$

Examples

Example 1

Input

3002.00

Output

R$ 80.36

Explanation

For the sample values 3002.00, evaluating the conditions in the statement gives R$ 80.36. Therefore the program prints the shown output.

Example 2

Input

1701.12

Output

Isento

Explanation

For the sample values 1701.12, evaluating the conditions in the statement gives Isento. Therefore the program prints the shown output.