The term natural family planning is identified in base64 scheme by the sequence bmF0dXJhbCBmYW1pbHkgcGxhbm5pbmc=, while the MD5 signature is equal to 0b4c1c62a2548e7a91e3ce3508896df4. The ASCII encoding of natural family planning in hexadecimal notation is 6e61747572616c2066616d696c7920706c616e6e696e67.