Common typos: fbvbxbdbvbxbdfvbxbdfbbxbdfbvxbdfbvbbdfbvbxsfbvbxbffbvbxbefbvbxbxfbvbxbcfbvbxbrfbvbxbddbvbxbdgbvbxbdrbvbxbdcbvbxbdvbvbxbdtbvbxbdfnvbxbdfvvbxbdfhvbxbdfgvbxbdfbcbxbdfbbbxbdfbfbxbdfbgbxbdfbvnxbdfbvvxbdfbvhxbdfbvgxbdfbvbzbdfbvbcbdfbvbsbdfbvbdbdfbvbxndfbvbxvdfbvbxhdfbvbxgfdbvbxbdbfvbxbdfvbbxbdfbbvxbdfbvxbbdfbvbbxsdfbvbxbdsfbvbxbfdfbvbxbdffbvbxbedfbvbxbdefbvbxbxdfbvbxbdxfbvbxbcdfbvbxbdcfbvbxbrdfbvbxbdrfbvbxbddfbvbxbdfdbvbxbdgfbvbxbdfgbvbxbdfrbvbxbdfcbvbxbdvfbvbxbdfvbvbxbdtfbvbxbdftbvbxbdfnbvbxbdfbnvbxbdfbvvbxbdfhbvbxbdfbhvbxbdfbgvbxbdfbcvbxbdfbvcbxbdfbbvbxbdfbvbbxbdfbfvbxbdfbvfbxbdfbvgbxbdfbvnbxbdfbvbnxbdfbvbvxbdfbvhbxbdfbvbhxbdfbvbgxbdfbvbzxbdfbvbxzbdfbvbcxbdfbvbxcbdfbvbsxbdfbvbxsbdfbvbdxbdfbvbxdbdfbvbxnbdfbvbxbndfbvbxvbdfbvbxbvdfbvbxhbdfbvbxbhdfbvbxgbdfbvbxbgdfbvbxxbdfbvbxbb