//C v0.01 不知题意，正在理解，正在（一）上修改。
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define STACK_SIZE 10000
typedef struct STACK{
char stack[STACK_SIZE];
int pointer;
}STSTACK;
STSTACK stack;
void push(char ch);
char pop();
int main(int argc, char *argv[])
{
int num;
int i;
char buf[STACK_SIZE]={0};
int sum = 0;
scanf("%d",&num);
getchar();
for(i = 0;i < num;i++){
memset(stack.stack, 0x00, STACK_SIZE);
stack.pointer = -1;
scanf("%s", buf);
getchar();
int len = strlen(buf);
//printf("%d
",len);
int j;
int flag=1;
for(j = 0;j < len;j++){
char tmp;
if(buf[j] == '[' || buf[j] == '('){
push(buf[j]);
}else if (buf[j] == ']') {
if(stack.pointer == -1){
//--stack.pointer;
flag = 0;
push(buf[j]);
//++sum;
//printf("No
");
//break;
continue;
}
tmp = pop();
if(tmp != '['){
//push(tmp);
//printf("No
");
flag = 0;
push(tmp);
push(buf[j]);
//break;
continue;
}/*else if(tmp == '['){
continue;
}*/
}else if (buf[j] == ')') {
if(stack.pointer == -1){
// --stack.pointer;
flag = 0;
push(buf[j]);
//++sum;
//printf("No
");
//break;
continue;
}
tmp = pop();
if(tmp != '('){
//push(tmp);
//printf("No
");
flag = 0;
push(tmp);
push(buf[j]);
//break;
continue;
}/*else if(tmp == '('){
continue;
}*/
}
}
if(stack.pointer == -1 && flag){
//printf("Yes
");
printf("0
");
}else{
//printf("No
");
printf("%d
",stack.pointer+1);
}
}
return 0;
}
void push(char ch){
stack.stack[++stack.pointer] = ch;
}
char pop(){
return stack.stack[stack.pointer--];
}