fn main() {
    println("len=01 lit=b sha=" + sha256_hex("b"))
    println("len=02 lit=cd sha=" + sha256_hex("cd"))
    println("len=03 lit=def sha=" + sha256_hex("def"))
    println("len=04 lit=efgh sha=" + sha256_hex("efgh"))
    println("len=05 lit=fghij sha=" + sha256_hex("fghij"))
    println("len=06 lit=ghijkl sha=" + sha256_hex("ghijkl"))
    println("len=07 lit=hijklmn sha=" + sha256_hex("hijklmn"))
    println("len=08 lit=ijklmnop sha=" + sha256_hex("ijklmnop"))
    println("len=09 lit=jklmnopqr sha=" + sha256_hex("jklmnopqr"))
    println("len=10 lit=klmnopqrst sha=" + sha256_hex("klmnopqrst"))
    println("len=11 lit=lmnopqrstuv sha=" + sha256_hex("lmnopqrstuv"))
    println("len=12 lit=mnopqrstuvwx sha=" + sha256_hex("mnopqrstuvwx"))
    println("len=13 lit=nopqrstuvwxyz sha=" + sha256_hex("nopqrstuvwxyz"))
    println("len=14 lit=opqrstuvwxyzab sha=" + sha256_hex("opqrstuvwxyzab"))
    println("len=15 lit=pqrstuvwxyzabcd sha=" + sha256_hex("pqrstuvwxyzabcd"))
    println("len=16 lit=qrstuvwxyzabcdef sha=" + sha256_hex("qrstuvwxyzabcdef"))
    println("len=17 lit=rstuvwxyzabcdefgh sha=" + sha256_hex("rstuvwxyzabcdefgh"))
    println("len=18 lit=stuvwxyzabcdefghij sha=" + sha256_hex("stuvwxyzabcdefghij"))
    println("len=19 lit=tuvwxyzabcdefghijkl sha=" + sha256_hex("tuvwxyzabcdefghijkl"))
    println("len=20 lit=uvwxyzabcdefghijklmn sha=" + sha256_hex("uvwxyzabcdefghijklmn"))
}