6 files changed, 101 insertions, 0 deletions
diff --git a/challenge-150/adam-russell/blog.txt b/challenge-150/adam-russell/blog.txt
new file mode 100644
index 0000000000..3e995cac42
--- /dev/null
+++ b/challenge-150/adam-russell/blog.txt
@@ -0,0 +1 @@
+http://www.rabbitfarm.com/cgi-bin/blosxom/perl/2022/02/06
diff --git a/challenge-150/adam-russell/blog1.txt b/challenge-150/adam-russell/blog1.txt
new file mode 100644
index 0000000000..e33f0d21ff
--- /dev/null
+++ b/challenge-150/adam-russell/blog1.txt
@@ -0,0 +1 @@
+http://www.rabbitfarm.com/cgi-bin/blosxom/prolog/2022/02/06
diff --git a/challenge-150/adam-russell/perl/ch-1.pl b/challenge-150/adam-russell/perl/ch-1.pl
new file mode 100644
index 0000000000..affb0bb1de
--- /dev/null
+++ b/challenge-150/adam-russell/perl/ch-1.pl
@@ -0,0 +1,26 @@
+use strict;
+use warnings;
+##
+# You are given two strings having same number of digits, $a and $b.
+# Write a script to generate Fibonacci Words by concatenation of  
+# the previous two strings. Print the 51st digit of the first term
+# having at least 51 digits.
+## 
+
+sub _fibonacci_words_51{
+    my($accumulated) = @_;
+    my $i = @{$accumulated} - 1;
+    my $next = $accumulated->[$i - 1] . $accumulated->[$i];
+    return substr($next, 51 - 1, 1) if length($next) >= 51;
+    push @{$accumulated}, $next;
+    _fibonacci_words_51($accumulated);
+}
+
+sub fibonacci_words{
+    my($u, $v) = @_;
+    return _fibonacci_words_51([$u, $v]);
+}
+
+MAIN:{
+    print fibonacci_words(q[1234], q[5678]) . "\n";    
+}
+\ No newline at end of file
diff --git a/challenge-150/adam-russell/perl/ch-2.pl b/challenge-150/adam-russell/perl/ch-2.pl
new file mode 100644
index 0000000000..0d8892be10
--- /dev/null
+++ b/challenge-150/adam-russell/perl/ch-2.pl
@@ -0,0 +1,34 @@
+use strict;
+use warnings;
+##
+# Write a script to generate all square-free integers <= 500.
+##
+use constant LIMIT => 500;
+
+sub prime_factor{
+    my $x = shift(@_); 
+    my @factors;    
+    for (my $y = 2; $y <= $x; $y++){
+        next if $x % $y;
+        $x /= $y;
+        push @factors, $y;
+        redo;
+    }
+    return @factors;  
+}
+
+sub square_free{
+    my @square_free;
+    for my $x (1 .. LIMIT){
+        my @factors = prime_factor($x);
+        my @a;
+        map {$a[$_]++} @factors;
+        @a = grep {$_ && $_ > 1} @a;
+        push @square_free, $x if !@a;
+    }
+    return @square_free;
+}
+
+main:{
+    print join(", ", square_free()) . "\n";
+}
diff --git a/challenge-150/adam-russell/prolog/ch-1.p b/challenge-150/adam-russell/prolog/ch-1.p
new file mode 100644
index 0000000000..1be9ebb36b
--- /dev/null
+++ b/challenge-150/adam-russell/prolog/ch-1.p
@@ -0,0 +1,8 @@
+fibonacci_words(Size, A, B) --> {atom_concat(A, B, C), atom_chars(C, Chars), length(Chars, N), N < Size}, [A], fibonacci_words(Size, B, C).
+fibonacci_words(Size, A, B) --> {atom_concat(A, B, C), atom_chars(C, Chars), length(Chars, N), N >= Size}, [C].
+
+fibonacci_words_nth_character(A, B, N, NthChar) :-
+    phrase(fibonacci_words(N, A, B), FibonacciWords),
+    last(FibonacciWords, LongestTerm),
+    atom_chars(LongestTerm, LongestTermChars),
+    nth(N, LongestTermChars, NthChar).
+\ No newline at end of file
diff --git a/challenge-150/adam-russell/prolog/ch-2.p b/challenge-150/adam-russell/prolog/ch-2.p
new file mode 100644
index 0000000000..4a7f900bf2
--- /dev/null
+++ b/challenge-150/adam-russell/prolog/ch-2.p
@@ -0,0 +1,31 @@
+prime_factors(N, L):- 
+    N > 0,  
+    prime_factors(N, L, 2).
+prime_factors(1, [], _):- 
+    !.
+prime_factors(N, [F|L], F):-                     
+    R is N // F, 
+    N =:= R * F, 
+    !, 
+    prime_factors(R, L, F).
+prime_factors(N, L, F):-
+    next_factor(N, F, NF), 
+    prime_factors(N, L, NF).
+next_factor(_, 2, 3):- 
+    !.
+next_factor(N, F, NF):- 
+    F * F < N, 
+    !, 
+    NF is F + 2.
+next_factor(N, _, N).
+
+square_free(N, SquareFree):-
+    findall(X,
+        (between(1, N, X),
+         prime_factors(X, PrimeFactors),
+         sort(PrimeFactors, PrimeFactorsSorted),
+         msort(PrimeFactors, PrimeFactorsMSorted),
+         length(PrimeFactorsSorted, SortedLength),
+         length(PrimeFactorsMSorted, MSortedLength),
+         SortedLength == MSortedLength), SquareFree).
+    
+\ No newline at end of file