diff --git a/semana23/exercicios-aula72/build/index.js b/semana23/exercicios-aula72/build/index.js
new file mode 100644
index 0000000..062e93b
--- /dev/null
+++ b/semana23/exercicios-aula72/build/index.js
@@ -0,0 +1,33 @@
+function isOneEdit(target, reference) {
+    if (reference.length > target.length + 1 || reference.length === target.length - 2) {
+        return false;
+    }
+    const targetCharList = target.split("");
+    const referenceCharList = reference.split("");
+    const strangerCharList = referenceCharList.filter(char => {
+        return !targetCharList.includes(char);
+    });
+    if (strangerCharList.length > 1) {
+        return false;
+    }
+    return true;
+}
+function sequenceCount(target) {
+    const count = {};
+    const splitedStr = target.split("");
+    let finalStr = "";
+    splitedStr.forEach(char => {
+        if (count[char]) {
+            count[char] += 1;
+        }
+        else {
+            count[char] = 1;
+        }
+    });
+    for (const char in count) {
+        finalStr += char + `${count[char]}`;
+    }
+    return finalStr.length > target.length ? target : finalStr;
+}
+console.log(sequenceCount('aabbb'));
+//# sourceMappingURL=index.js.map
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diff --git a/semana23/exercicios-aula72/build/index.js.map b/semana23/exercicios-aula72/build/index.js.map
new file mode 100644
index 0000000..a3c9664
--- /dev/null
+++ b/semana23/exercicios-aula72/build/index.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAGA,SAAS,SAAS,CAAC,MAAc,EAAE,SAAiB;IAClD,IAAG,SAAS,CAAC,MAAM,GAAG,MAAM,CAAC,MAAM,GAAG,CAAC,IAAI,SAAS,CAAC,MAAM,KAAK,MAAM,CAAC,MAAM,GAAE,CAAC,EAAC;QAC/E,OAAO,KAAK,CAAA;KACb;IAED,MAAM,cAAc,GAAG,MAAM,CAAC,KAAK,CAAC,EAAE,CAAC,CAAA;IACvC,MAAM,iBAAiB,GAAG,SAAS,CAAC,KAAK,CAAC,EAAE,CAAC,CAAA;IAE7C,MAAM,gBAAgB,GAAG,iBAAiB,CAAC,MAAM,CAAC,IAAI,CAAA,EAAE;QACtD,OAAO,CAAE,cAAc,CAAC,QAAQ,CAAC,IAAI,CAAC,CAAA;IACxC,CAAC,CAAC,CAAA;IAEF,IAAG,gBAAgB,CAAC,MAAM,GAAG,CAAC,EAAC;QAC7B,OAAO,KAAK,CAAA;KACb;IAED,OAAO,IAAI,CAAA;AACb,CAAC;AAMD,SAAS,aAAa,CAAC,MAAc;IACnC,MAAM,KAAK,GAAc,EAAE,CAAA;IAC3B,MAAM,UAAU,GAAG,MAAM,CAAC,KAAK,CAAC,EAAE,CAAC,CAAA;IACnC,IAAI,QAAQ,GAAG,EAAE,CAAA;IAEjB,UAAU,CAAC,OAAO,CAAC,IAAI,CAAA,EAAE;QACvB,IAAG,KAAK,CAAC,IAAI,CAAC,EAAC;YACb,KAAK,CAAC,IAAI,CAAC,IAAI,CAAC,CAAA;SACjB;aAAI;YACH,KAAK,CAAC,IAAI,CAAC,GAAG,CAAC,CAAA;SAChB;IACH,CAAC,CAAC,CAAA;IAEF,KAAI,MAAM,IAAI,IAAI,KAAK,EAAC;QACtB,QAAQ,IAAI,IAAI,GAAC,GAAG,KAAK,CAAC,IAAI,CAAC,EAAE,CAAA;KAClC;IAED,OAAO,QAAQ,CAAC,MAAM,GAAG,MAAM,CAAC,MAAM,CAAC,CAAC,CAAC,MAAM,CAAC,CAAC,CAAC,QAAQ,CAAA;AAC5D,CAAC;AAED,OAAO,CAAC,GAAG,CAAC,aAAa,CAAC,OAAO,CAAC,CAAC,CAAA"}
\ No newline at end of file
diff --git a/semana23/exercicios-aula73/README.md b/semana23/exercicios-aula73/README.md
new file mode 100644
index 0000000..435a78e
--- /dev/null
+++ b/semana23/exercicios-aula73/README.md
@@ -0,0 +1,16 @@
+### Exercícios aula 73
+
+### 1.
+r: O(n);
+
+### 2.
+r: O(n);
+
+### 3.
+r: O(1);
+
+### 4.
+r: O(n);
+
+### 5.
+r: Ordem decrescente de eficiência: replaceMatrixValue(E3) > findFirstRecurringCharacter(E1) > func(E2) > verifyIfExistRepeatedNumbers(E4).
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