Add ch-1 in Ruby

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diff --git a/challenge-274/spadacciniweb/ruby/ch-1.rb b/challenge-274/spadacciniweb/ruby/ch-1.rb
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+# Task 1: Goat Latin
+# Submitted by: Mohammad Sajid Anwar
+# 
+# You are given a sentence, $sentance.
+# Write a script to convert the given sentence to Goat Latin, a made up language similar to Pig Latin.
+# Rules for Goat Latin:
+# 
+# 1) If a word begins with a vowel ("a", "e", "i", "o", "u"), append
+#    "ma" to the end of the word.
+# 2) If a word begins with consonant i.e. not a vowel, remove first
+#    letter and append it to the end then add "ma".
+# 3) Add letter "a" to the end of first word in the sentence, "aa" to
+#    the second word, etc etc.
+# 
+# Example 1
+# Input: $sentence = "I love Perl"
+# Output: "Imaa ovelmaaa erlPmaaaa"
+# 
+# Example 2
+# Input: $sentence = "Perl and Raku are friends"
+# Output: "erlPmaa andmaaa akuRmaaaa aremaaaaa riendsfmaaaaaa"
+# 
+# Example 3
+# Input: $sentence = "The Weekly Challenge"
+# Output: "heTmaa eeklyWmaaa hallengeCmaaaa"
+
+def goat_latin(sentence)
+    new_sentences = []
+    sentence.split.each_with_index do | w, idx |
+        unless w.match?(/^[aeiou]/i)
+            w=w[1, w.length-1]+w[0]
+        end
+        new_sentences.push( w+"ma"+"a"*(idx+1) )
+    end
+
+    printf "sentence '%s' -> '%s'\n",
+        sentence,
+        new_sentences.join(" ")
+end
+
+sentence = "I love Perl"
+goat_latin(sentence)
+
+sentence = "Perl and Raku are friends"
+goat_latin(sentence)
+
+sentence = "The Weekly Challenge"
+goat_latin(sentence)