Mock Gyros (Steak in Pitas)

Ingredients

• 1 pound sirloin steak
• 3 tablespoons red wine vinegar
• 1 tablespoon Worcestershire sauce
• 1 tablespoon salad oil
• 3 garlic cloves
• 6 pita bread
• 1 freezer bag -- gallon
• 1 cucumber -- peeled and grated
• 1 pkg. yogurt -- (8 oz.) plain