diff --git a/final_lang/fort.py b/final_lang/fort.py
index befbf52..b090c1f 100644
--- a/final_lang/fort.py
+++ b/final_lang/fort.py
@@ -170,7 +170,7 @@ t_plus = r'\+'
 t_minus = r'-'
 t_mul = r'\*'
 t_string = r'\'[a-zA-Z0-9 \?\:\t\r\n\f()\[\]\&\!\@\#\$\%\^\-\=\+\/\,]*\''
-t_comment = r'![a-zA-Z0-9 \?\:\t\r\n\f()\[\]\&\!\@\#\$\%\^\-\=\+\/\,]*!'
+t_comment = r'![a-zA-Z0-9 \?\:\t\r\n\f()\[\]\&\!\@\#\$\%\^\-\=\+\/\,]*\n'
 t_or = r'\.or\.'
 t_and = r'\.and\.'
 t_not = r'\.not\.'
diff --git a/final_lang/programas/programa4.fort b/final_lang/programas/programa4.fort
new file mode 100644
index 0000000..5766779
--- /dev/null
+++ b/final_lang/programas/programa4.fort
@@ -0,0 +1,38 @@
+program p4
+integer :: number
+subroutine readNumber
+    do then
+        !Asking the user for the number
+        print 'Enter your number: ', endline
+        read number
+        !Verifying that the number is withing the desired range
+        if (number >= 0 .and. number <= 7) then
+            exit
+        end if
+        print 'Number must be between 0 and 7', endline
+    end do
+end subroutine
+readNumber()
+!Printing the adequate string for every number
+print 'Your number is: '
+if (number == 0) then
+    print 'zero'
+elif (number == 1) then
+    print 'one'
+elif (number == 2) then
+    print 'two'
+elif (number == 3) then
+    print 'three'
+elif (number == 4) then
+    print 'four'
+elif (number == 5) then
+    print 'five'
+elif (number == 6) then
+    print 'six'
+elif (number == 7) then
+    print 'seven'
+else
+    print 'unknown'
+end if
+print endline
+end program
\ No newline at end of file
diff --git a/final_lang/programas/programa4.fort.out b/final_lang/programas/programa4.fort.out
new file mode 100644
index 0000000..1c31a97
--- /dev/null
+++ b/final_lang/programas/programa4.fort.out
@@ -0,0 +1,49 @@
+goto 14
+print 'Enter your number: '
+print endline
+read $200
+>= $200 0 $0
+<= $200 7 $1
+.and. $0 $1 $2
+gotoF $2   10
+goto   13
+print 'Number must be between 0 and 7'
+print endline
+goto   2
+goback
+call 2
+print 'Your number is: '
+== $200 0 $2
+gotoF $2   20
+print 'zero'
+goto  49
+== $200 1 $2
+gotoF $2   24
+print 'one'
+goto  49
+== $200 2 $2
+gotoF $2   28
+print 'two'
+goto  49
+== $200 3 $2
+gotoF $2   32
+print 'three'
+goto  49
+== $200 4 $2
+gotoF $2   36
+print 'four'
+goto  49
+== $200 5 $2
+gotoF $2   40
+print 'five'
+goto  49
+== $200 6 $2
+gotoF $2   44
+print 'six'
+goto  49
+== $200 7 $2
+gotoF $2   48
+print 'seven'
+goto  49
+print 'unknown'
+print endline