31ms | Go solution
\nfunc countConsistentStrings(allowed string, words []string) int {\n  ans := 0\n\n  for _, word := range words {\n    for _, ch := range word {\n      res := s
```\nfunc countConsistentStrings(allowed string, words []string) int {\n  ans := 0\n\n  for _, word := range words {\n    for _, ch := range word {\n      res := strings.ContainsRune(allowed, ch)\n      if !res {\n        ans--\n        break\n      }\n    }\n    ans++\n  }\n\n  return ans\n}\n\n```
['Go']