#!/bin/bash

# awk -F ":" '{key=($2":"$3); print key; a[key]+=1}END{for(x in a) a[x],x}' nowcoder.txt 
awk -F ":" '{key=$2":"$3; a[key]+=1}END{for(x in a) print a[x],x}' nowcoder.txt | sort -r