labda

#include <stdio.h>
#include <stdlib.h>

int is_match_result( char *s )
 {
   int i=1;
if(!isalpha(s[0]))
   return 0;

while(s[i]!=' '){
 if(!((isalnum(s[i]))||s[i]=='-'))
   return 0;
 if(s[i]=='-'){
if(!(isalpha(s[i-1])))
   return 0;
 if(!(isalpha(s[i+1])))
   return 0;}
 i++;
}

if(!(isalpha(s[i-1])))
  return 0;

if(s[i]!=' ') return 0; i++;
if(s[i]!='-') return 0; i++;
if(s[i]!=' ') return 0; i++;


if(!isalpha(s[i])) return 0; i++;
 while(s[i]!=' '){
 if(!((isalnum(s[i]))||s[i]=='-'))
   return 0;
 if(s[i]=='-'){
 if(!(isalpha(s[i-1])))
   return 0;
 if(!(isalpha(s[i+1])))
   return 0;}
  i++;
}
if(s[i]!=' ') return 0; i++;
while(s[i]!=':'){
  if(!isdigit(s[i])) return 0;
     i++;
}

if(s[i]!=':') return 0;
i++;
     for(;s[i];i++){
      if(!isdigit(s[i])) return 0;


}
return 1;
}


#include <stdio.h>
#include <stdlib.h>
int main()
{
  char line[ 1000 ];
  int is_match_result( char * );
  while ( gets( line ) != NULL )
    if ( is_match_result( line ) )
      puts( "YES" );
    else
      puts( "NO" );
  return EXIT_SUCCESS;
}