Add tasks for all the new languages

Task/Odd-word-problem/EchoLisp/odd-word-problem-1.echolisp

@@ -0,0 +1,30 @@
+(lib 'sequences)
+(define input-stream null)
+(define output-stream "")
+
+;;---------------------------
+;; character I/O simulation
+;; --------------------------
+(define (read-char) (next input-stream)) ;; #f if EOF
+(define (write-char c) (when c (set! output-stream (string-append output-stream c))))
+
+(define (init-streams sentence)
+	(set! input-stream (procrastinator sentence))
+	(set! output-stream ""))
+
+;;---------------------------------
+;; task , using read-char/write-char
+;;----------------------------------
+
+(define (flop) ; reverses,  and returns first non-alpha after word, or EOF
+	(define c (read-char))
+	(if (string-alphabetic? c) (begin0 (flop) (write-char c)) c))
+	
+(define (flip)
+    (define c (read-char))
+    (if (string-alphabetic? c) (begin (write-char c)  (flip)) c))
+
+(define (task sentence)
+	 (init-streams sentence)
+	 (while (and (write-char (flip)) (write-char (flop))))
+	 output-stream )

Task/Odd-word-problem/EchoLisp/odd-word-problem-2.echolisp

@@ -0,0 +1,5 @@
+(task "what,is,the;meaning,of:life.")
+    → "what,si,the;gninaem,of:efil."
+; check diacritical
+(task "Longtemps,je me suis couché,héhé,hôhô,de bonne heure.")
+    → "Longtemps,ej me sius couché,éhéh,hôhô,ed bonne erueh."